hydroxymethylbilane synthase (porphobilinogen deaminase) is the third enzyme of the heme biosynthetic pathway and catalyzes the stepwise polymerization of four molecules of porphobilinogen (PBG) into the linear tetrapyrrole 1-hydroxymethylbilane
cd00494; Hydroxymethylbilane synthase (HMBS), also known as porphobilinogen deaminase (PBGD), ...
6-278
2.02e-172
cd00494; Hydroxymethylbilane synthase (HMBS), also known as porphobilinogen deaminase (PBGD), is an intermediate enzyme in the biosynthetic pathway of tetrapyrrolic ring systems, such as heme, chlorophyll, and vitamin B12. HMBS catalyzes the conversion of porphobilinogen (PBG) into hydroxymethylbilane (HMB). This subfamily includes the three domains of Escherichia coli HMBS and its closely related proteins. The enzyme is believed to bind substrate through a hinge-bending motion of domains 1 and 2. The C-terminal domain 3 contains an invariant cysteine that forms the covalent attachment site for the DPM (dipyrromethane) cofactor. HMBS is found in all organisms except viruses. The domains 1 and 2 have the same overall topology as found in the type 2 periplasmic-binding proteins (PBP2), many of which are involved in chemotaxis and uptake of nutrients and other small molecules from the extracellular space as a primary receptor.
Pssm-ID: 270364 [Multi-domain] Cd Length: 274 Bit Score: 478.27 E-value: 2.02e-172
hydroxymethylbilane synthase; Alternate name hydroxymethylbilane synthase Biosynthesis of ...
6-295
1.36e-143
hydroxymethylbilane synthase; Alternate name hydroxymethylbilane synthase Biosynthesis of cofactors, prosthetic groups, and carriers: Heme and porphyrin [Biosynthesis of cofactors, prosthetic groups, and carriers, Heme, porphyrin, and cobalamin]
Pssm-ID: 272963 [Multi-domain] Cd Length: 292 Bit Score: 406.27 E-value: 1.36e-143
cd00494; Hydroxymethylbilane synthase (HMBS), also known as porphobilinogen deaminase (PBGD), ...
6-278
2.02e-172
cd00494; Hydroxymethylbilane synthase (HMBS), also known as porphobilinogen deaminase (PBGD), is an intermediate enzyme in the biosynthetic pathway of tetrapyrrolic ring systems, such as heme, chlorophyll, and vitamin B12. HMBS catalyzes the conversion of porphobilinogen (PBG) into hydroxymethylbilane (HMB). This subfamily includes the three domains of Escherichia coli HMBS and its closely related proteins. The enzyme is believed to bind substrate through a hinge-bending motion of domains 1 and 2. The C-terminal domain 3 contains an invariant cysteine that forms the covalent attachment site for the DPM (dipyrromethane) cofactor. HMBS is found in all organisms except viruses. The domains 1 and 2 have the same overall topology as found in the type 2 periplasmic-binding proteins (PBP2), many of which are involved in chemotaxis and uptake of nutrients and other small molecules from the extracellular space as a primary receptor.
Pssm-ID: 270364 [Multi-domain] Cd Length: 274 Bit Score: 478.27 E-value: 2.02e-172
Hydroxymethylbilane synthase possesses the type 2 periplasmic binding protein fold; ...
5-278
1.01e-143
Hydroxymethylbilane synthase possesses the type 2 periplasmic binding protein fold; Hydroxymethylbilane synthase (HMBS), also known as porphobilinogen deaminase (PBGD), is an intermediate enzyme in the biosynthetic pathway of tetrapyrrolic ring systems, such as heme, chlorophyll, vitamin B12 and related macrocycles. HMBS catalyzes the conversion of porphobilinogen (PBG) into hydroxymethylbilane (HMB). This family includes the three domains of HMBS. The enzyme is believed to bind substrate through a hinge-bending motion of domains 1 and 2. The C-terminal domain 3 contains an invariant cysteine that forms the covalent attachment site for the DPM (dipyrromethane) cofactor. HMBS is found in all organisms except viruses. The domains 1 and 2 have the same overall topology as found in the type 2 periplasmic-binding proteins (PBP2), many of which are involved in chemotaxis and uptake of nutrients and other small molecules from the extracellular space as a primary receptor.
Pssm-ID: 270213 [Multi-domain] Cd Length: 274 Bit Score: 405.90 E-value: 1.01e-143
hydroxymethylbilane synthase; Alternate name hydroxymethylbilane synthase Biosynthesis of ...
6-295
1.36e-143
hydroxymethylbilane synthase; Alternate name hydroxymethylbilane synthase Biosynthesis of cofactors, prosthetic groups, and carriers: Heme and porphyrin [Biosynthesis of cofactors, prosthetic groups, and carriers, Heme, porphyrin, and cobalamin]
Pssm-ID: 272963 [Multi-domain] Cd Length: 292 Bit Score: 406.27 E-value: 1.36e-143
Human porphobilinogen deaminase possess type 2 periplasmic binding protein fold; ...
5-279
2.67e-126
Human porphobilinogen deaminase possess type 2 periplasmic binding protein fold; Hydroxymethylbilane synthase (HMBS), also known as porphobilinogen deaminase (PBGD), is an intermediate enzyme in the biosynthetic pathway of tetrapyrrolic ring systems, such as heme, chlorophyll, and vitamin B12. HMBS catalyzes the conversion of porphobilinogen (PBG) into hydroxymethylbilane (HMB). This subfamily includes the three domains of human PBGD and its closely related proteins. Mutations in human PBGD cause AIP (acute intermittent porphyria), an inherited autosomal dominant disorder. The enzyme is believed to bind substrate through a hinge-bending motion of domains 1 and 2. The C-terminal domain 3 contains an invariant cysteine that forms the covalent attachment site for the DPM (dipyrromethane) cofactor. HMBS is found in all organisms except viruses. The domains 1 and 2 have the same overall topology as found in the type 2 periplasmic-binding proteins (PBP2), many of which are involved in chemotaxis and uptake of nutrients and other small molecules from the extracellular space as a primary receptor.
Pssm-ID: 270363 [Multi-domain] Cd Length: 282 Bit Score: 361.94 E-value: 2.67e-126
An uncharacterized subgroup of the PBGD family; the type 2 periplasmic binding protein fold; ...
5-278
1.54e-118
An uncharacterized subgroup of the PBGD family; the type 2 periplasmic binding protein fold; Hydroxymethylbilane synthase (HMBS), also known as porphobilinogen deaminase (PBGD), is an intermediate enzyme in the biosynthetic pathway of tetrapyrrolic ring systems, such as heme, chlorophyll, and vitamin B12. HMBS catalyzes the conversion of porphobilinogen (PBG) into hydroxymethylbilane (HMB). This subfamily includes the three domains of HMBS. The enzyme is believed to bind substrate through a hinge-bending motion of domains 1 and 2. The C-terminal domain 3 contains an invariant cysteine that forms the covalent attachment site for the DPM (dipyrromethane) cofactor. HMBS is found in all organisms except viruses. The domains 1 and 2 have the same overall topology as found in the type 2 periplasmic-binding proteins (PBP2), many of which are involved in chemotaxis and uptake of nutrients and other small molecules from the extracellular space as a primary receptor.
Pssm-ID: 270366 [Multi-domain] Cd Length: 278 Bit Score: 342.08 E-value: 1.54e-118
An uncharacterized subgroup of the PBGD family; the type 2 periplasmic binding protein fold; ...
6-270
1.20e-109
An uncharacterized subgroup of the PBGD family; the type 2 periplasmic binding protein fold; Hydroxymethylbilane synthase (HMBS), also known as porphobilinogen deaminase (PBGD), is an intermediate enzyme in the biosynthetic pathway of tetrapyrrolic ring systems, such as heme, chlorophyll, and vitamin B12. HMBS catalyzes the conversion of porphobilinogen (PBG) into hydroxymethylbilane (HMB). This subfamily includes the three domains of HMBS. The enzyme is believed to bind substrate through a hinge-bending motion of domains 1 and 2. The C-terminal domain 3 contains an invariant cysteine that forms the covalent attachment site for the DPM (dipyrromethane) cofactor. HMBS is found in all organisms except viruses. The domains 1 and 2 have the same overall topology as found in the type 2 periplasmic-binding proteins (PBP2), many of which are involved in chemotaxis and uptake of nutrients and other small molecules from the extracellular space as a primary receptor.
Pssm-ID: 270365 [Multi-domain] Cd Length: 282 Bit Score: 319.62 E-value: 1.20e-109
Archaeal HemC of hydroxymethylbilane synthase family; the type 2 periplasmic binding protein ...
6-279
1.77e-89
Archaeal HemC of hydroxymethylbilane synthase family; the type 2 periplasmic binding protein fold; Hydroxymethylbilane synthase (HMBS), also known as porphobilinogen deaminase (PBGD), is an intermediate enzyme in the biosynthetic pathway of tetrapyrrolic ring systems, such as heme, chlorophyll, and vitamin B12. HMBS catalyzes the conversion of porphobilinogen (PBG) into hydroxymethylbilane (HMB). This subfamily includes the three domains of HMBS. The enzyme is believed to bind substrate through a hinge-bending motion of domains 1 and 2. The C-terminal domain 3 contains an invariant cysteine that forms the covalent attachment site for the DPM (dipyrromethane) cofactor. HMBS is found in all organisms except viruses. The domains 1 and 2 have the same overall topology as found in the type 2 periplasmic-binding proteins (PBP2), many of which are involved in chemotaxis and uptake of nutrients and other small molecules from the extracellular space as a primary receptor.
Pssm-ID: 270362 [Multi-domain] Cd Length: 273 Bit Score: 268.02 E-value: 1.77e-89
Type 2 periplasmic binding fold superfamily; This evolutionary model and hierarchy represent ...
6-201
2.29e-09
Type 2 periplasmic binding fold superfamily; This evolutionary model and hierarchy represent the ligand-binding domains found in solute binding proteins that serve as initial receptors in the transport, signal transduction and channel gating. The PBP2 proteins share the same architecture as periplasmic binding proteins type 1 (PBP1), but have a different topology. They are typically comprised of two globular subdomains connected by a flexible hinge and bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. The origin of PBP module can be traced across the distant phyla, including eukaryotes, archebacteria, and prokaryotes. The majority of PBP2 proteins are involved in the uptake of a variety of soluble substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis. Besides transport proteins, the family includes ionotropic glutamate receptors and unorthodox sensor proteins involved in signal transduction. The substrate binding domain of the LysR transcriptional regulators and the oligopeptide-like transport systems also contain the type 2 periplasmic binding fold and thus they are significantly homologous to that of the PBP2; however, these two families are grouped into a separate hierarchy of the PBP2 superfamily due to the large number of protein sequences.
Pssm-ID: 270214 [Multi-domain] Cd Length: 196 Bit Score: 56.04 E-value: 2.29e-09
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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