Protein Kinases, catalytic domain; The protein kinase superfamily is mainly composed of the catalytic domains of serine/threonine-specific and tyrosine-specific protein kinases. It also includes RIO kinases, which are atypical serine protein kinases, aminoglycoside phosphotransferases, and choline kinases. These proteins catalyze the transfer of the gamma-phosphoryl group from ATP to hydroxyl groups in specific substrates such as serine, threonine, or tyrosine residues of proteins.

                            10        20        30        40        50        60        70        80
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2118801467    93 VTLHNILDSFKAPLSEDQAWALIHQFAGLYHQVAVQAhtcaaeYEATLPTGFELHFHRDGSVHFSGQEQLphkEGEG--L 170
Cdd:smart00750    1 VSLADILEVRGRPLNEEEIWAVCLQCLGALRELHRQA------KSGNILLTWDGLLKLDGSVAFKTPEQS---RPDPyfM 71

                            90       100       110       120       130       140       150       160
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2118801467   171 PQEQDKIGDQPdhsasssgdssaivinrafdnnhhhhhhhtplvvsHRKIISELAEIVYTALDYNLPEDEECQMSQELES 250
Cdd:smart00750   72 APEVIQGQSYT-----------------------------------EKADIYSLGITLYEALDYELPYNEERELSAILEI 116

                           170       180       190       200       210       220       230
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 2118801467   251 LFNFMTADETDDDCIDEGIDEGdkrwdddseeerndtKELEHIIETCRNHI-KTTLPENHYKAVCRALVTETIEL 324
Cdd:smart00750  117 LLNGMPADDPRDRSNLEGVSAA---------------RSFEDFMRLCASRLpQRREAANHYLAHCRALFAETLEL 176

first tandem Wiskott-Aldrich Syndrome Homology (WASP) region 2 (WH2 motif) repeat of protein Spire homologs 1 and 2; This family contains the first tandem Wiskott-Aldrich syndrome protein (WASP)-homology domain 2 (WH2) domain in human Spire family proteins Spire-1 (also called Spir1) and Spire-2 (Spir2) and related proteins. Spire is an actin nucleator essential for establishing an actin mesh during oogenesis. It was first identified as a Drosophila maternal effect gene essential to establishment of both the anterior/posterior and dorsal/ventral body axes in developing oocytes and embryos. It has been found to sever filaments and sequester monomers in addition to nucleating new filaments; it remains associated with the slow-growing pointed end of the new filament. Spire is involved in intracellular vesicle transport along actin fibers, providing a novel link between actin cytoskeleton dynamics and intracellular transport. It is required for asymmetric spindle positioning and asymmetric cell division during oocyte meiosis. Spire contains four tandem WH2 domains. The mammalian genome encodes two Spire proteins, namely Spire-1 and Spire-2. This model contains WH2 domain 1 of human Spire-1 and Spire-2 . Major expression of both spire genes have been detected during embryogenesis in the developing nervous system). In addition, spire1 expression is found in the fetal liver, while spire2 expression is seen in early stages of intestinal development. In adult tissues, the spire2 gene shows a rather broad expression pattern, which includes the epithelial cells of the digestive tract, testical spermatocytes, and neuronal cells of the nervous system. In contrast, spire1 is mainly expressed in neuronal cells of the nervous system. Minor expression levels were detected in testis and spleen. Spire also acts in the nucleus where, together with Spire-1 and Spire-2, it promotes assembly of nuclear actin filaments in response to DNA damage in order to facilitate movement of chromatin and repair factors after DNA damage. High levels of spire1 expression are restricted to the nervous system, oocytes, and testis. Since function of Spire-1 and Spire-2 in oocyte maturation is redundant, spire1 mutant mice are fertile, overall brain anatomy is not altered, and visual and motor functions remain normal; however, detailed behavioral studies of the spire1 mutant mice unveiled a very specific and highly significant phenotype in terms of fear learning in male mice.

                           10        20        30
                   ....*....|....*....|....*....|..
gi 2118801467  352 ELAKLGFNDWARFWVQVIDELRRGVRLKKSNH 383
Cdd:cd22065      1 ELDELQNTDWARLWVQVMRELRNGVKLKKVQE 32

fourth tandem Wiskott-Aldrich Syndrome Homology (WASP) region 2 (WH2 motif) repeat found in Drosophila melanogaster Spire, and similar proteins; This family contains the fourth of four tandem repeats of Wiskott-Aldrich syndrome protein (WASP)-homology domain 2 (WH2) in Drosophila melanogaster Spire (also called Spir), an actin nucleator essential for establishing an actin mesh during oogenesis. Spire was first identified as a Drosophila maternal effect gene essential to establishment of both the anterior/posterior and dorsal/ventral body axes in developing oocytes and embryos. It has been found to sever filaments and sequester monomers in addition to nucleating new filaments; it remains associated with the slow-growing pointed end of the new filament. Spire promotes dissociation of the actin nucleator Cappuccino (Capu) from the barbed end of actin filaments. Spire is involved in intracellular vesicle transport along actin fibers, providing a link between actin cytoskeleton dynamics and intracellular transport. Drosophila Spire contains four tandem WH2 domains which appear to function by determining the size of filament nuclei according to the number of WH2 repeats, suggesting that the WH2 domains of Spire line up actin subunits along a filament strand of the actin double helix, thereby generating nuclei for actin assembly. This model contains the fourth tandem WH2 domain of Spire (also called Spir-D or WH2-A).

                           10        20
                   ....*....|....*....|....*....
gi 2118801467  454 CEPSPREQLMESIRKGKELKQITPPEAPT 482
Cdd:cd22069      1 CEPSPREQLMESIRKGKELKQITPPEAAA 29

104 kDa microneme/rhoptry antigen; Provisional

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2118801467  551 PKMPPYPFGGYMVPSQARQDCRETASLMRPRRTMEPARQTAPPEEPSFTEDEYHRFYDTALESYDLATQC---ESRRASL 627
Cdd:PTZ00449   624 PKRPESPKSPKRPPPPQRPSSPERPEGPKIIKSPKPPKSPKPPFDPKFKEKFYDDYLDAAAKSKETKTTVvldESFESIL 703

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2118801467  628 RRHTIVGCQSNLDETHSMPPTRPEsrqsddvNKETPRRSPAEPTHPSDEaNSTSSLGPWNKSFMDKQTwmeRGDDRLSVT 707
Cdd:PTZ00449   704 KETLPETPGTPFTTPRPLPPKLPR-------DEEFPFEPIGDPDAEQPD-DIEFFTPPEEERTFFHET---PADTPLPDI 772

                   ....*
gi 2118801467  708 LAEIV 712
Cdd:PTZ00449   773 LAEEF 777

kinase non-catalytic C-lobe domain; It is an interaction domain identified as being similar to the C-terminal protein kinase catalytic fold (C lobe). Its presence at the N terminus of signalling proteins and the absence of the active-site residues in the catalytic and activation loops suggest that it folds independently and is likely to be non-catalytic. The occurrence of KIND only in metazoa implies that it has evolved from the catalytic protein kinase domain into an interaction domain possibly by keeping the substrate-binding features

                            10        20        30        40        50        60        70        80
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2118801467    93 VTLHNILDSFKAPLSEDQAWALIHQFAGLYHQVAVQAhtcaaeYEATLPTGFELHFHRDGSVHFSGQEQLphkEGEG--L 170
Cdd:smart00750    1 VSLADILEVRGRPLNEEEIWAVCLQCLGALRELHRQA------KSGNILLTWDGLLKLDGSVAFKTPEQS---RPDPyfM 71

                            90       100       110       120       130       140       150       160
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2118801467   171 PQEQDKIGDQPdhsasssgdssaivinrafdnnhhhhhhhtplvvsHRKIISELAEIVYTALDYNLPEDEECQMSQELES 250
Cdd:smart00750   72 APEVIQGQSYT-----------------------------------EKADIYSLGITLYEALDYELPYNEERELSAILEI 116

                           170       180       190       200       210       220       230
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 2118801467   251 LFNFMTADETDDDCIDEGIDEGdkrwdddseeerndtKELEHIIETCRNHI-KTTLPENHYKAVCRALVTETIEL 324
Cdd:smart00750  117 LLNGMPADDPRDRSNLEGVSAA---------------RSFEDFMRLCASRLpQRREAANHYLAHCRALFAETLEL 176

second tandem Wiskott-Aldrich Syndrome Homology (WASP) region 2 (WH2 motif) repeat of protein Spire homolog 1 (Spir1), and related proteins; This family contains the second tandem Wiskott-Aldrich syndrome protein (WASP)-homology domain 2 (WH2) domain in human Spire family protein Spire-1 (also called Spir1) and related proteins. Spire is an actin nucleator essential for establishing an actin mesh during oogenesis. It was first identified as a Drosophila maternal effect gene essential to establishment of both the anterior/posterior and dorsal/ventral body axes in developing oocytes and embryos. It has been found to sever filaments and sequester monomers in addition to nucleating new filaments; it remains associated with the slow-growing pointed end of the new filament. Spire is involved in intracellular vesicle transport along actin fibers, providing a novel link between actin cytoskeleton dynamics and intracellular transport. It is required for asymmetric spindle positioning and asymmetric cell division during oocyte meiosis. Spire contains four tandem WH2 domains. The mammalian genome encodes two Spire proteins, namely Spire-1 (Spir1) and Spire-2 (Spir2). This model contains WH2 domain 2 of human Spire-1 protein. Major expression of both spire genes have been detected during embryogenesis in the developing nervous system). In addition, spire1 expression is found in the fetal liver, and in adult tissues, spire1 is mainly expressed in neuronal cells of the nervous system. Minor expression levels were detected in testis and spleen. Spire also acts in the nucleus where, together with Spire-1 and Spire-2, it promotes assembly of nuclear actin filaments in response to DNA damage in order to facilitate movement of chromatin and repair factors after DNA damage. High levels of spire1 expression are restricted to the nervous system, oocytes, and testis. Since function of Spire-1 and Spire-2 in oocyte maturation is redundant, spire1 mutant mice are fertile, overall brain anatomy is not altered, and visual and motor functions remain normal; however, detailed behavioral studies of the spire1 mutant mice unveiled a very specific and highly significant phenotype in terms of fear learning in male mice. This family also contains the second of four tandem repeats of WH2 in Drosophila melanogaster Spire (also called Spir), an actin nucleator essential for establishing an actin mesh during oogenesis.

                           10        20        30
                   ....*....|....*....|....*....|..
gi 2118801467  389 EYELTPYEILMGDIRAKKYQLRKVMVNGDIPP 420
Cdd:cd22078      1 EYELTPYEMLMDDIRSKRYTLRKVMVNGDIPP 32

FYVE-related domain found in Spir proteins, Spire1 and Spire2; Spir proteins were originally discovered as the protein products of the Drosophila spire gene. They are Jun N-terminal kinase (JNK)-interacting proteins that have exclusively been identified in metazoans. They may play roles in membrane trafficking and cortical filament crosslinking. This family includes Spire1 and Spire2, which function as new essential factors in asymmetric division of oocytes. They mediate asymmetric spindle positioning by assembling a cytoplasmic actin network. They are also required for polar body extrusion by promoting assembly of the cleavage furrow. Moreover, they cooperate synergistically with Fmn2 to assemble F-actin in oocytes. Both Spire1 and Spire2 contain an N-terminal protein-interaction KIND domain, WH2 actin-binding domains, a Rab GTPase-interaction Spir-box, and a C-terminal FYVE membrane-binding domain. Their FYVE domains resemble FYVE-related domains that are structurally similar to the canonical FYVE domains but lack the three signature sequences: an N-terminal WxxD motif (x for any residue), the central basic R(R/K)HHCRxCG patch, and a C-terminal RVC motif, which form a binding pocket that specifically bind the phospholipid phosphatidylinositol 3-phosphate (PtdIns3P or PI3P).

                           10        20        30
                   ....*....|....*....|....*....|....*.
gi 2118801467  738 KRRVCFLCLRTRFSFFgPWGIQCKLCQRTVCAKCYT 773
Cdd:cd15748      1 KGKVCFCCKKKKFSFF-TWPNTCKLCKRVVCSKCCR 35

third tandem Wiskott-Aldrich Syndrome Homology (WASP) region 2 (WH2 motif) repeat found in Drosophila melanogaster Spire, and similar proteins; This family contains the third of four tandem repeats of Wiskott-Aldrich syndrome protein (WASP)-homology domain 2 (WH2) in Drosophila melanogaster Spire (also called Spir), an actin nucleator essential for establishing an actin mesh during oogenesis. Spire was first identified as a Drosophila maternal effect gene essential to establishment of both the anterior/posterior and dorsal/ventral body axes in developing oocytes and embryos. It has been found to sever filaments and sequester monomers in addition to nucleating new filaments; it remains associated with the slow-growing pointed end of the new filament. Spire promotes dissociation of the actin nucleator Cappuccino (Capu) from the barbed end of actin filaments. Spire is involved in intracellular vesicle transport along actin fibers, providing a link between actin cytoskeleton dynamics and intracellular transport. Drosophila Spire contains four tandem WH2 domains which appear to function by determining the size of filament nuclei according to the number of WH2 repeats, suggesting that the WH2 domains of Spire line up actin subunits along a filament strand of the actin double helix, thereby generating nuclei for actin assembly. This model contains the third tandem WH2 domain of Spire (also called Spir-C or WH2-C), which plays a unique role whereby two critical residues have been identified for activity for binding to actin with positive cooperativity.

                           10        20
                   ....*....|....*....|....*.
gi 2118801467  422 VKKDAHAMILEFIRSRPPLKKASERQ 447
Cdd:cd22068      1 VKKDAHAMILEFIRSRPPLKKASDRQ 26

kinase non-catalytic C-lobe domain; It is an interaction domain identified as being similar to the C-terminal protein kinase catalytic fold (C lobe). Its presence at the N terminus of signalling proteins and the absence of the active-site residues in the catalytic and activation loops suggest that it folds independently and is likely to be non-catalytic. The occurrence of KIND only in metazoa implies that it has evolved from the catalytic protein kinase domain into an interaction domain possibly by keeping the substrate-binding features

                            10        20        30        40        50        60        70        80
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2118801467    93 VTLHNILDSFKAPLSEDQAWALIHQFAGLYHQVAVQAhtcaaeYEATLPTGFELHFHRDGSVHFSGQEQLphkEGEG--L 170
Cdd:smart00750    1 VSLADILEVRGRPLNEEEIWAVCLQCLGALRELHRQA------KSGNILLTWDGLLKLDGSVAFKTPEQS---RPDPyfM 71

                            90       100       110       120       130       140       150       160
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 2118801467   171 PQEQDKIGDQPdhsasssgdssaivinrafdnnhhhhhhhtplvvsHRKIISELAEIVYTALDYNLPEDEECQMSQELES 250
Cdd:smart00750   72 APEVIQGQSYT-----------------------------------EKADIYSLGITLYEALDYELPYNEERELSAILEI 116

                           170       180       190       200       210       220       230
                    ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 2118801467   251 LFNFMTADETDDDCIDEGIDEGdkrwdddseeerndtKELEHIIETCRNHI-KTTLPENHYKAVCRALVTETIEL 324
Cdd:smart00750  117 LLNGMPADDPRDRSNLEGVSAA---------------RSFEDFMRLCASRLpQRREAANHYLAHCRALFAETLEL 176

second tandem Wiskott-Aldrich Syndrome Homology (WASP) region 2 (WH2 motif) repeat of protein Spire homolog 1 (Spir1), and related proteins; This family contains the second tandem Wiskott-Aldrich syndrome protein (WASP)-homology domain 2 (WH2) domain in human Spire family protein Spire-1 (also called Spir1) and related proteins. Spire is an actin nucleator essential for establishing an actin mesh during oogenesis. It was first identified as a Drosophila maternal effect gene essential to establishment of both the anterior/posterior and dorsal/ventral body axes in developing oocytes and embryos. It has been found to sever filaments and sequester monomers in addition to nucleating new filaments; it remains associated with the slow-growing pointed end of the new filament. Spire is involved in intracellular vesicle transport along actin fibers, providing a novel link between actin cytoskeleton dynamics and intracellular transport. It is required for asymmetric spindle positioning and asymmetric cell division during oocyte meiosis. Spire contains four tandem WH2 domains. The mammalian genome encodes two Spire proteins, namely Spire-1 (Spir1) and Spire-2 (Spir2). This model contains WH2 domain 2 of human Spire-1 protein. Major expression of both spire genes have been detected during embryogenesis in the developing nervous system). In addition, spire1 expression is found in the fetal liver, and in adult tissues, spire1 is mainly expressed in neuronal cells of the nervous system. Minor expression levels were detected in testis and spleen. Spire also acts in the nucleus where, together with Spire-1 and Spire-2, it promotes assembly of nuclear actin filaments in response to DNA damage in order to facilitate movement of chromatin and repair factors after DNA damage. High levels of spire1 expression are restricted to the nervous system, oocytes, and testis. Since function of Spire-1 and Spire-2 in oocyte maturation is redundant, spire1 mutant mice are fertile, overall brain anatomy is not altered, and visual and motor functions remain normal; however, detailed behavioral studies of the spire1 mutant mice unveiled a very specific and highly significant phenotype in terms of fear learning in male mice. This family also contains the second of four tandem repeats of WH2 in Drosophila melanogaster Spire (also called Spir), an actin nucleator essential for establishing an actin mesh during oogenesis.

                           10        20        30
                   ....*....|....*....|....*....|..
gi 2118801467  389 EYELTPYEILMGDIRAKKYQLRKVMVNGDIPP 420
Cdd:cd22078      1 EYELTPYEMLMDDIRSKRYTLRKVMVNGDIPP 32

FYVE-related domain found in Spir proteins, Spire1 and Spire2; Spir proteins were originally discovered as the protein products of the Drosophila spire gene. They are Jun N-terminal kinase (JNK)-interacting proteins that have exclusively been identified in metazoans. They may play roles in membrane trafficking and cortical filament crosslinking. This family includes Spire1 and Spire2, which function as new essential factors in asymmetric division of oocytes. They mediate asymmetric spindle positioning by assembling a cytoplasmic actin network. They are also required for polar body extrusion by promoting assembly of the cleavage furrow. Moreover, they cooperate synergistically with Fmn2 to assemble F-actin in oocytes. Both Spire1 and Spire2 contain an N-terminal protein-interaction KIND domain, WH2 actin-binding domains, a Rab GTPase-interaction Spir-box, and a C-terminal FYVE membrane-binding domain. Their FYVE domains resemble FYVE-related domains that are structurally similar to the canonical FYVE domains but lack the three signature sequences: an N-terminal WxxD motif (x for any residue), the central basic R(R/K)HHCRxCG patch, and a C-terminal RVC motif, which form a binding pocket that specifically bind the phospholipid phosphatidylinositol 3-phosphate (PtdIns3P or PI3P).

                           10        20        30
                   ....*....|....*....|....*....|....*.
gi 2118801467  738 KRRVCFLCLRTRFSFFgPWGIQCKLCQRTVCAKCYT 773
Cdd:cd15748      1 KGKVCFCCKKKKFSFF-TWPNTCKLCKRVVCSKCCR 35

fourth tandem Wiskott-Aldrich Syndrome Homology (WASP) region 2 (WH2 motif) repeat found in Drosophila melanogaster Spire, and similar proteins; This family contains the fourth of four tandem repeats of Wiskott-Aldrich syndrome protein (WASP)-homology domain 2 (WH2) in Drosophila melanogaster Spire (also called Spir), an actin nucleator essential for establishing an actin mesh during oogenesis. Spire was first identified as a Drosophila maternal effect gene essential to establishment of both the anterior/posterior and dorsal/ventral body axes in developing oocytes and embryos. It has been found to sever filaments and sequester monomers in addition to nucleating new filaments; it remains associated with the slow-growing pointed end of the new filament. Spire promotes dissociation of the actin nucleator Cappuccino (Capu) from the barbed end of actin filaments. Spire is involved in intracellular vesicle transport along actin fibers, providing a link between actin cytoskeleton dynamics and intracellular transport. Drosophila Spire contains four tandem WH2 domains which appear to function by determining the size of filament nuclei according to the number of WH2 repeats, suggesting that the WH2 domains of Spire line up actin subunits along a filament strand of the actin double helix, thereby generating nuclei for actin assembly. This model contains the fourth tandem WH2 domain of Spire (also called Spir-D or WH2-A).

                           10        20
                   ....*....|....*....|....*....
gi 2118801467  454 CEPSPREQLMESIRKGKELKQITPPEAPT 482
Cdd:cd22069      1 CEPSPREQLMESIRKGKELKQITPPEAAA 29

second tandem Wiskott-Aldrich Syndrome Homology (WASP) region 2 (WH2 motif) repeat of protein Spire homolog 2; This family contains the second tandem Wiskott-Aldrich syndrome protein (WASP)-homology domain 2 (WH2) domain in human Spire family protein Spire-2 (also called Spir2) and related proteins. Spire is an actin nucleator essential for establishing an actin mesh during oogenesis. It was first identified as a Drosophila maternal effect gene essential to establishment of both the anterior/posterior and dorsal/ventral body axes in developing oocytes and embryos. It has been found to sever filaments and sequester monomers in addition to nucleating new filaments; it remains associated with the slow-growing pointed end of the new filament. Spire is involved in intracellular vesicle transport along actin fibers, providing a novel link between actin cytoskeleton dynamics and intracellular transport. It is required for asymmetric spindle positioning and asymmetric cell division during oocyte meiosis. Spire contains four tandem WH2 domains. The mammalian genome encodes two Spire proteins, namely Spire-1 (Spir1) and Spire-2 (Spir2). This model contains WH2 domain 2 of human Spire-2. Major expression of both spire genes have been detected during embryogenesis in the developing nervous system). In addition, spire2 expression is seen in early stages of intestinal development. In adult tissues, the spire2 gene shows a rather broad expression pattern, which includes the epithelial cells of the digestive tract, testical spermatocytes, and neuronal cells of the nervous system. Spire also acts in the nucleus where, together with Spire-1 and Spire-2, it promotes assembly of nuclear actin filaments in response to DNA damage in order to facilitate movement of chromatin and repair factors after DNA damage.

                           10        20        30
                   ....*....|....*....|....*....|
gi 2118801467  391 ELTPYEILMGDIRAKKYQLRKVMVNGDIPP 420
Cdd:cd22079      1 QLTPFEMLMQDIRARKYKLRKVMVDGDIPP 30

FYVE-related domain found in protein spire homolog 2 (Spire2) and similar proteins; Spire2 is encoded by gene spir-2, which is expressed in the nervous system and highly expressed in the colonic epithelium. It functions as a new essential factor in asymmetric division of oocytes. It mediates asymmetric spindle positioning by assembling a cytoplasmic actin network. It is also required for polar body extrusion by promoting assembly of the cleavage furrow. Moreover, it cooperates synergistically with Fmn2 to assemble F-actin in oocytes. Spire2 contains an N-terminal protein-interaction KIND domain, WH2 actin-binding domains, a Rab GTPase-interaction Spir-box, and a C-terminal FYVE membrane-binding domain. The FYVE domain resembles a FYVE-related domain that is structurally similar to the canonical FYVE domains but lacks the three signature sequences: an N-terminal WxxD motif (x for any residue), the central basic R(R/K)HHCRxCG patch, and a C-terminal RVC motif, which form a binding pocket that specifically binds the phospholipid phosphatidylinositol 3-phosphate (PtdIns3P or PI3P).

                           10        20        30        40        50
                   ....*....|....*....|....*....|....*....|....*....|..
gi 2118801467  736 VEKRRVCfLCLRTRFSFFGpWGIQCKLCQRTVCAKCYTKMRIPSEHFRNVPL 787
Cdd:cd15768      1 LKKGKIC-CCCRVKFPLFS-WPSNCLFCKRSVCSSCSMKMKMPSKKLAHIPV 50

second, third, and fourth, tandem Wiskott-Aldrich Syndrome Homology (WASP) region 2 (WH2 motif) repeats of protein Spire; This family contains the Wiskott-Aldrich syndrome protein (WASP)-homology domain 2 (WH2) repeats 2-4 in human Spire (also called Spir), Drosophila Spire, and related proteins. Spire is an actin nucleator essential for establishing an actin mesh during oogenesis. This WH2-containing actin nucleator was first identified as a Drosophila maternal effect gene essential to establishment of both the anterior/posterior and dorsal/ventral body axes in developing oocytes and embryos. It has been found to sever filaments and sequester monomers in addition to nucleating new filaments; it remains associated with the slow-growing pointed end of the new filament. Spire is involved in intracellular vesicle transport along actin fibers, providing a novel link between actin cytoskeleton dynamics and intracellular transport. It is required for asymmetric spindle positioning and asymmetric cell division during oocyte meiosis. Spire contains four tandem WH2 domains. Several spire gene family members have been identified, including paralogs Spire-1 (Spir1) and Spire-2 (Spir2) in higher eukaryotes. Spire acts in the nucleus where, together with Spire-1 and Spire-2, it promotes assembly of nuclear actin filaments in response to DNA damage in order to facilitate movement of chromatin and repair factors after DNA damage. Spire-1 and Spire-2 encode a modified Fab1/YOTB/Vac1/EEA1 (FYVE)-type zinc finger membrane-binding domain at their C-termini that promiscuously interacts with negatively charged lipids and the interaction of these proteins with additional factors may provide the specificity for its targeting to the correct subpopulation of vesicles.

                           10        20
                   ....*....|....*....|..
gi 2118801467  423 KKDAHAMILEFIRSRPPLKKAS 444
Cdd:cd22066      1 QKSPHEMILEFIRSRPPLKKVS 22

FYVE-related domain found in RUN and FYVE domain-containing protein 4 (RUFY4) and similar proteins; RUFY4 belongs to the FUFY protein family which is characterized by the presence of an N-terminal RUN domain and a C-terminal FYVE domain. The FYVE domain of RUFY4 resembles the FYVE-related domain as it lacks the WxxD motif (x for any residue). The biological function of RUFY4 still remains unclear.

                           10        20        30
                   ....*....|....*....|....*....|....*...
gi 2118801467  742 CFLCLRTrFSFFGPwGIQCKLCQRTVCAKCYTKMRIPS 779
Cdd:cd15745      2 CAICAKA-FSLFRR-KYVCRLCGGVVCHSCSSEDLVLS 37

FYVE domain like superfamily; FYVE domain is a 60-80 residue double zinc finger motif-containing module named after the four proteins, Fab1, YOTB, Vac1, and EEA1. The canonical FYVE domains are distinguished from other zinc fingers by three signature sequences: an N-terminal WxxD motif (x for any residue), the central basic R(R/K)HHCRxCG patch, and a C-terminal RVC motif, which form a compact phosphatidylinositol 3-phosphate (PtdIns3P, also termed PI3P)-binding site. They are found in many membrane trafficking regulators, including EEA1, Hrs, Vac1p, Vps27p, and FENS-1, which locate to early endosomes, specifically bind PtdIns3P, and play important roles in vesicular traffic and in signal transduction. Some proteins, such as rabphilin-3A and alpha-Rab3-interacting molecules (RIMs), are also involved in membrane trafficking and bind to members of the Rab subfamily of GTP hydrolases. However, they contain FYVE-related domains that are structurally similar to the canonical FYVE domains but lack the three signature sequences. At this point, they may not bind to phosphoinositides. In addition, this superfamily also contains the third group of proteins, caspase-associated ring proteins CARP1 and CARP2. They do not localize to membranes in the cell and are involved in the negative regulation of apoptosis, specifically targeting two initiator caspases, caspase 8 and caspase 10, which are distinguished from other FYVE-type proteins. Moreover, these proteins have an altered sequence in the basic ligand binding patch and lack the WxxD motif that is conserved only in phosphoinositide binding FYVE domains. Thus they constitute a family of unique FYVE-type domains called FYVE-like domains. The FYVE domain is structurally similar to the RING domain and the PHD finger. This superfamily also includes ADDz zinc finger domain, which is a PHD-like zinc finger motif that contains two parts, a C2-C2 and a PHD-like zinc finger.

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|....*
gi 2118801467  742 CFLClRTRFSFFgPWGIQCKLCQRTVCAKCYTKMRIPSEHFRNVP 786
Cdd:cd00065      2 CMLC-GKKFSLF-RRRHHCRRCGRVFCSKCSSKKLPLPSFGSGKP 44