Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

dbSNP Short Genetic Variations

Welcome to the Reference SNP (rs) Report

All alleles are reported in the Forward orientation. Click on the Variant Details tab for details on Genomic Placement, Gene, and Amino Acid changes. HGVS names are in the HGVS tab.

Reference SNP (rs) Report

This page reports data for a single dbSNP Reference SNP variation (RefSNP or rs) from the new redesigned dbSNP build.
Top of the page reports a concise summary for the rs, with more specific details included in the corresponding tabs below.
All alleles are reported in the Forward orientation. Use the Genomic View to inspect the nucleotides flanking the variant, and its neighbors.
For more information see Help documentation.


Current Build 155

Released April 9, 2021

Homo sapiens
chr1:1106647-1106649 (GRCh38.p13) Help

The anchor position for this RefSNP. Includes all nucleotides potentially affected by this change, thus it can differ from HGVS, which is right-shifted. See here for details.

Variation Type
Indel Insertion and Deletion
delAC=0.017541 (4643/264690, TOPMED)
delAC=0.016536 (2319/140240, GnomAD)
delAC=0.01196 (168/14050, ALFA) (+ 1 more)
delAC=0.0144 (72/5008, 1000G)
Clinical Significance
Not Reported in ClinVar
Gene : Consequence
C1orf159 : Intron Variant
0 citations
Genomic View
See rs on genome

Variant Details tab shows known variant placements on genomic sequences: chromosomes (NC_), RefSeqGene, pseudogenes or genomic regions (NG_), and in a separate table: on transcripts (NM_) and protein sequences (NP_). The corresponding transcript and protein locations are listed in adjacent lines, along with molecular consequences from Sequence Ontology. When no protein placement is available, only the transcript is listed. Column "Codon[Amino acid]" shows the actual base change in the format of "Reference > Alternate" allele, including the nucleotide codon change in transcripts, and the amino acid change in proteins, respectively, allowing for known ribosomal slippage sites. To view nucleotides adjacent to the variant use the Genomic View at the bottom of the page - zoom into the sequence until the nucleotides around the variant become visible.

Genomic Placements
Sequence name Change
GRCh38.p13 chr 1 NC_000001.11:g.1106648_1106649del
GRCh37.p13 chr 1 NC_000001.10:g.1042028_1042029del
Gene: C1orf159, chromosome 1 open reading frame 159 (minus strand)
Molecule type Change Amino acid[Codon] SO Term
C1orf159 transcript variant 1 NM_001330306.2:c.-136+837…


N/A Intron Variant
C1orf159 transcript variant 3 NM_001363525.2:c.-136+837…


N/A Intron Variant
C1orf159 transcript variant 2 NM_017891.5:c.-136+9412_-…


N/A Intron Variant

Clinical Significance tab shows a list of clinical significance entries from ClinVar associated with the variation, per allele. Click on the RCV accession (i.e. RCV000001615.2) or Allele ID (i.e. 12274) to access full ClinVar report.

Not Reported in ClinVar

ALFA Allele Frequency
The ALFA project provide aggregate allele frequency from dbGaP. More information is available on the project page including descriptions, data access, and terms of use.

Release Version: 20201027095038
Population Group Sample Size Ref Allele Alt Allele
Total Global 14050 CAC=0.98804 C=0.01196
European Sub 9690 CAC=0.9997 C=0.0003
African Sub 2898 CAC=0.9482 C=0.0518
African Others Sub 114 CAC=0.912 C=0.088
African American Sub 2784 CAC=0.9497 C=0.0503
Asian Sub 112 CAC=1.000 C=0.000
East Asian Sub 86 CAC=1.00 C=0.00
Other Asian Sub 26 CAC=1.00 C=0.00
Latin American 1 Sub 146 CAC=0.986 C=0.014
Latin American 2 Sub 610 CAC=0.997 C=0.003
South Asian Sub 98 CAC=1.00 C=0.00
Other Sub 496 CAC=0.978 C=0.022


Frequency tab displays a table of the reference and alternate allele frequencies reported by various studies and populations. Table lines, where Population="Global" refer to the entire study population, whereas lines, where Group="Sub", refer to a study-specific population subgroupings (i.e. AFR, CAU, etc.), if available. Frequency for the alternate allele (Alt Allele) is a ratio of samples observed-to-total, where the numerator (observed samples) is the number of chromosomes in the study with the minor allele present (found in "Sample size", where Group="Sub"), and the denominator (total samples) is the total number of all chromosomes in the study for the variant (found in "Sample size", where Group="Study-wide" and Population="Global").

Study Population Group Sample Size Ref Allele Alt Allele
TopMed Global Study-wide 264690 CAC=0.982459 delAC=0.017541
gnomAD - Genomes Global Study-wide 140240 CAC=0.983464 delAC=0.016536
gnomAD - Genomes European Sub 75942 CAC=0.99982 delAC=0.00018
gnomAD - Genomes African Sub 42038 CAC=0.94750 delAC=0.05250
gnomAD - Genomes American Sub 13658 CAC=0.99466 delAC=0.00534
gnomAD - Genomes Ashkenazi Jewish Sub 3324 CAC=1.0000 delAC=0.0000
gnomAD - Genomes East Asian Sub 3124 CAC=1.0000 delAC=0.0000
gnomAD - Genomes Other Sub 2154 CAC=0.9884 delAC=0.0116
1000Genomes Global Study-wide 5008 CAC=0.9856 delAC=0.0144
1000Genomes African Sub 1322 CAC=0.9493 delAC=0.0507
1000Genomes East Asian Sub 1008 CAC=1.0000 delAC=0.0000
1000Genomes Europe Sub 1006 CAC=1.0000 delAC=0.0000
1000Genomes South Asian Sub 978 CAC=1.000 delAC=0.000
1000Genomes American Sub 694 CAC=0.993 delAC=0.007

Aliases tab displays HGVS names representing the variant placements and allele changes on genomic, transcript and protein sequences, per allele. HGVS name is an expression for reporting sequence accession and version, sequence type, position, and allele change. The column "Note" can have two values: "diff" means that there is a difference between the reference allele (variation interval) at the placement reported in HGVS name and the reference alleles reported in other HGVS names, and "rev" means that the sequence of this variation interval at the placement reported in HGVS name is in reverse orientation to the sequence(s) of this variation in other HGVS names not labeled as "rev".

Placement CAC= delAC
GRCh38.p13 chr 1 NC_000001.11:g.1106647_1106649= NC_000001.11:g.1106648_1106649del
GRCh37.p13 chr 1 NC_000001.10:g.1042027_1042029= NC_000001.10:g.1042028_1042029del
C1orf159 transcript variant 1 NM_001330306.2:c.-136+8375= NM_001330306.2:c.-136+8374_-136+8375del
C1orf159 transcript variant 3 NM_001363525.2:c.-136+8375= NM_001363525.2:c.-136+8374_-136+8375del
C1orf159 transcript variant 2 NM_017891.4:c.-136+9413= NM_017891.4:c.-136+9412_-136+9413del
C1orf159 transcript variant 2 NM_017891.5:c.-136+9413= NM_017891.5:c.-136+9412_-136+9413del
C1orf159 transcript variant X1 XM_005244764.1:c.-136+8375= XM_005244764.1:c.-136+8374_-136+8375del
C1orf159 transcript variant X16 XM_005244765.1:c.-136+9413= XM_005244765.1:c.-136+9412_-136+9413del
C1orf159 transcript variant X3 XM_005244766.1:c.-136+9413= XM_005244766.1:c.-136+9412_-136+9413del

Submissions tab displays variations originally submitted to dbSNP, now supporting this RefSNP cluster (rs). We display Submitter handle, Submission identifier, Date and Build number, when the submission appeared for the first time. Direct submissions to dbSNP have Submission ID in the form of an ss-prefixed number (ss#). Other supporting variations are listed in the table without ss#.

10 SubSNP, 4 Frequency submissions
No Submitter Submission ID Date (Build)
1 BUSHMAN ss193082091 Jul 04, 2010 (132)
2 1000GENOMES ss325997328 May 09, 2011 (135)
3 1000GENOMES ss498763991 May 04, 2012 (137)
4 LUNTER ss550899280 Apr 25, 2013 (138)
5 1000GENOMES ss1367645831 Aug 21, 2014 (142)
6 TOPMED ss2321524609 Dec 20, 2016 (150)
7 GNOMAD ss2750670598 Nov 08, 2017 (151)
8 TOPMED ss3066469327 Nov 08, 2017 (151)
9 KHV_HUMAN_GENOMES ss3798746776 Jul 12, 2019 (153)
10 TOPMED ss4436516844 Apr 25, 2021 (155)
11 1000Genomes NC_000001.10 - 1042027 Oct 11, 2018 (152)
12 gnomAD - Genomes NC_000001.11 - 1106647 Apr 25, 2021 (155)
13 TopMed NC_000001.11 - 1106647 Apr 25, 2021 (155)
14 ALFA NC_000001.11 - 1106647 Apr 25, 2021 (155)

History tab displays RefSNPs (Associated ID) from previous builds (Build) that now support the current RefSNP, and the dates, when the history was updated for each Associated ID (History Updated).

Associated ID History Updated (Build)
rs138993058 Sep 17, 2011 (135)
Added to this RefSNP Cluster:
Submission IDs Observation SPDI Canonical SPDI Source RSIDs
ss325997328, ss550899280 NC_000001.9:1031889:CA: NC_000001.11:1106646:CAC:C (self)
14983, ss498763991, ss1367645831, ss2321524609, ss2750670598 NC_000001.10:1042026:CA: NC_000001.11:1106646:CAC:C (self)
138764, 69404, 123179, ss3066469327, ss3798746776, ss4436516844 NC_000001.11:1106646:CA: NC_000001.11:1106646:CAC:C (self)
3224576331 NC_000001.11:1106646:CAC:C NC_000001.11:1106646:CAC:C (self)
ss193082091 NT_032977.10:520658:CA: NC_000001.11:1106646:CAC:C (self)

Publications tab displays PubMed articles citing the variation as a listing of PMID, Title, Author, Year, Journal, ordered by Year, descending.

No publications for rs112018535


The Flanks tab provides retrieving flanking sequences of a SNP on all molecules that have placements.

Genome context:
Select flank length:

Genomic regions, transcripts, and products
Top Help

NCBI Graphical Sequence Viewer display of the genomic region, transcripts and protein products for the reported RefSNP (rs).
Use the zoom option to view the nucleotides around the RefSNP and find other neighboring RefSNPs.
Visit Sequence Viewer for help with navigating inside the display and modifying the selection of displayed data tracks.

Software version is: 2.0.1.post596+ae089ad