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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
chr13:24459158 (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
SNV Single Nucleotide Variation
A=0.000011 (3/264690, TOPMED)
A=0.000004 (1/236120, GnomAD_exome)
A=0.000014 (2/140190, GnomAD) (+ 5 more)
A=0.000017 (2/117780, ExAC)
A=0.00000 (0/10680, ALFA)
A=0.0002 (1/5008, 1000G)
G=0.5 (1/2, SGDP_PRJ)
A=0.5 (1/2, SGDP_PRJ)
Clinical Significance
Not Reported in ClinVar
Gene : Consequence
PARP4 : 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 13 NC_000013.11:g.24459158G>A
GRCh37.p13 chr 13 NC_000013.10:g.25033296G>A
Gene: PARP4, poly(ADP-ribose) polymerase family member 4 (minus strand)
Molecule type Change Amino acid[Codon] SO Term
PARP4 transcript NM_006437.4:c.2346-36C>T N/A Intron Variant
PARP4 transcript variant X1 XM_011534931.1:c.2487-36C…


N/A Intron Variant
PARP4 transcript variant X2 XM_011534932.2:c.2346-36C…


N/A Intron Variant
PARP4 transcript variant X3 XR_941496.1:n. 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 10680 G=1.00000 A=0.00000
European Sub 6962 G=1.0000 A=0.0000
African Sub 2294 G=1.0000 A=0.0000
African Others Sub 84 G=1.00 A=0.00
African American Sub 2210 G=1.0000 A=0.0000
Asian Sub 108 G=1.000 A=0.000
East Asian Sub 84 G=1.00 A=0.00
Other Asian Sub 24 G=1.00 A=0.00
Latin American 1 Sub 146 G=1.000 A=0.000
Latin American 2 Sub 610 G=1.000 A=0.000
South Asian Sub 94 G=1.00 A=0.00
Other Sub 466 G=1.000 A=0.000


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 G=0.999989 A=0.000011
gnomAD - Exomes Global Study-wide 236120 G=0.999996 A=0.000004
gnomAD - Exomes European Sub 130676 G=1.000000 A=0.000000
gnomAD - Exomes Asian Sub 44502 G=1.00000 A=0.00000
gnomAD - Exomes American Sub 30002 G=1.00000 A=0.00000
gnomAD - Exomes African Sub 15606 G=0.99994 A=0.00006
gnomAD - Exomes Ashkenazi Jewish Sub 9524 G=1.0000 A=0.0000
gnomAD - Exomes Other Sub 5810 G=1.0000 A=0.0000
gnomAD - Genomes Global Study-wide 140190 G=0.999986 A=0.000014
gnomAD - Genomes European Sub 75916 G=0.99999 A=0.00001
gnomAD - Genomes African Sub 42008 G=0.99998 A=0.00002
gnomAD - Genomes American Sub 13658 G=1.00000 A=0.00000
gnomAD - Genomes Ashkenazi Jewish Sub 3322 G=1.0000 A=0.0000
gnomAD - Genomes East Asian Sub 3134 G=1.0000 A=0.0000
gnomAD - Genomes Other Sub 2152 G=1.0000 A=0.0000
ExAC Global Study-wide 117780 G=0.999983 A=0.000017
ExAC Europe Sub 71154 G=1.00000 A=0.00000
ExAC Asian Sub 24570 G=1.00000 A=0.00000
ExAC American Sub 11336 G=1.00000 A=0.00000
ExAC African Sub 9832 G=0.9998 A=0.0002
ExAC Other Sub 888 G=1.000 A=0.000
1000Genomes Global Study-wide 5008 G=0.9998 A=0.0002
1000Genomes African Sub 1322 G=0.9992 A=0.0008
1000Genomes East Asian Sub 1008 G=1.0000 A=0.0000
1000Genomes Europe Sub 1006 G=1.0000 A=0.0000
1000Genomes South Asian Sub 978 G=1.000 A=0.000
1000Genomes American Sub 694 G=1.000 A=0.000
SGDP_PRJ Global Study-wide 2 G=0.5 A=0.5

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 G= A
GRCh38.p13 chr 13 NC_000013.11:g.24459158= NC_000013.11:g.24459158G>A
GRCh37.p13 chr 13 NC_000013.10:g.25033296= NC_000013.10:g.25033296G>A
PARP4 transcript NM_006437.3:c.2346-36= NM_006437.3:c.2346-36C>T
PARP4 transcript NM_006437.4:c.2346-36= NM_006437.4:c.2346-36C>T
PARP4 transcript variant X1 XM_011534931.1:c.2487-36= XM_011534931.1:c.2487-36C>T
PARP4 transcript variant X2 XM_011534932.2:c.2346-36= XM_011534932.2:c.2346-36C>T

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#.

8 SubSNP, 7 Frequency submissions
No Submitter Submission ID Date (Build)
1 SNP500CANCER ss5586214 Mar 31, 2003 (113)
2 JMKIDD_LAB ss1078937868 Aug 21, 2014 (142)
3 1000GENOMES ss1347495626 Aug 21, 2014 (142)
4 EVA_EXAC ss1691227704 Apr 01, 2015 (144)
5 GNOMAD ss2740317794 Nov 08, 2017 (151)
6 SGDP_PRJ ss3879593618 Apr 27, 2020 (154)
7 GNOMAD ss4262739277 Apr 26, 2021 (155)
8 TOPMED ss4939954331 Apr 26, 2021 (155)
9 1000Genomes NC_000013.10 - 25033296 Oct 12, 2018 (152)
10 ExAC NC_000013.10 - 25033296 Oct 12, 2018 (152)
11 gnomAD - Genomes NC_000013.11 - 24459158 Apr 26, 2021 (155)
12 gnomAD - Exomes NC_000013.10 - 25033296 Jul 13, 2019 (153)
13 SGDP_PRJ NC_000013.10 - 25033296 Apr 27, 2020 (154)
14 TopMed NC_000013.11 - 24459158 Apr 26, 2021 (155)
15 ALFA NC_000013.11 - 24459158 Apr 26, 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).

Added to this RefSNP Cluster:
Submission IDs Observation SPDI Canonical SPDI Source RSIDs
60339053, 1551337, 9559232, 31610598, ss1078937868, ss1347495626, ss1691227704, ss2740317794, ss3879593618 NC_000013.10:25033295:G:A NC_000013.11:24459157:G:A (self)
425515127, 155499989, 14628300843, ss4262739277, ss4939954331 NC_000013.11:24459157:G:A NC_000013.11:24459157:G:A
ss5586214 NT_024524.14:6013295:G:A NC_000013.11:24459157:G:A (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 rs4986820


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