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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 154

Released April 21, 2020

Homo sapiens
chr3:120641571 (GRCh38.p12) 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
C=0.037228 (9353/251238, GnomAD_exome)
C=0.032015 (4020/125568, TOPMED)
C=0.037519 (4552/121326, ExAC) (+ 17 more)
C=0.04508 (1414/31368, GnomAD)
C=0.04244 (552/13006, GO-ESP)
C=0.04964 (560/11282, ALFA Project)
C=0.0134 (67/5008, 1000G)
C=0.0902 (404/4480, Estonian)
C=0.0605 (233/3854, ALSPAC)
C=0.0658 (244/3708, TWINSUK)
C=0.0326 (37/1136, Daghestan)
C=0.069 (69/998, GoNL)
C=0.050 (30/600, NorthernSweden)
C=0.039 (21/534, MGP)
C=0.023 (5/216, Qatari)
C=0.17 (7/40, GENOME_DK)
T=0.50 (10/20, SGDP_PRJ)
C=0.50 (10/20, SGDP_PRJ)
T=0.5 (3/6, Siberian)
C=0.5 (3/6, Siberian)
Clinical Significance
Not Reported in ClinVar
Gene : Consequence
HGD : 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.p12 chr 3 NC_000003.12:g.120641571T>C
GRCh37.p13 chr 3 NC_000003.11:g.120360418T>C
HGD RefSeqGene NG_011957.1:g.45911A>G
Gene: HGD, homogentisate 1,2-dioxygenase (minus strand)
Molecule type Change Amino acid[Codon] SO Term
HGD transcript NM_000187.4:c.879+18A>G N/A Intron Variant
HGD transcript variant X1 XM_005247412.2:c.654+18A>G N/A Intron Variant
HGD transcript variant X2 XM_005247413.2:c.879+18A>G N/A Intron Variant
HGD transcript variant X4 XM_011512746.2:c.879+18A>G N/A Intron Variant
HGD transcript variant X3 XM_017006277.2:c.456+18A>G N/A Intron Variant
HGD transcript variant X5 XM_005247414.5:c. N/A Genic Downstream Transcript 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 (New)
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 28358 T=0.94813 C=0.05187
European Sub 20482 T=0.93785 C=0.06215
African Sub 3582 T=0.9869 C=0.0131
African Others Sub 122 T=0.992 C=0.008
African American Sub 3460 T=0.9867 C=0.0133
Asian Sub 174 T=1.000 C=0.000
East Asian Sub 116 T=1.000 C=0.000
Other Asian Sub 58 T=1.00 C=0.00
Latin American 1 Sub 154 T=0.974 C=0.026
Latin American 2 Sub 616 T=0.990 C=0.010
South Asian Sub 100 T=0.99 C=0.01
Other Sub 3250 T=0.9569 C=0.0431


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
gnomAD - Exomes Global Study-wide 251238 T=0.962772 C=0.037228
gnomAD - Exomes European Sub 135222 T=0.943005 C=0.056995
gnomAD - Exomes Asian Sub 48986 T=0.99353 C=0.00647
gnomAD - Exomes American Sub 34578 T=0.98597 C=0.01403
gnomAD - Exomes African Sub 16254 T=0.99114 C=0.00886
gnomAD - Exomes Ashkenazi Jewish Sub 10066 T=0.95321 C=0.04679
gnomAD - Exomes Other Sub 6132 T=0.9627 C=0.0373
TopMed Global Study-wide 125568 T=0.967985 C=0.032015
ExAC Global Study-wide 121326 T=0.962481 C=0.037519
ExAC Europe Sub 73326 T=0.94396 C=0.05604
ExAC Asian Sub 25144 T=0.99288 C=0.00712
ExAC American Sub 11546 T=0.98813 C=0.01187
ExAC African Sub 10404 T=0.99077 C=0.00923
ExAC Other Sub 906 T=0.966 C=0.034
gnomAD - Genomes Global Study-wide 31368 T=0.95492 C=0.04508
gnomAD - Genomes European Sub 18892 T=0.93293 C=0.06707
gnomAD - Genomes African Sub 8694 T=0.9915 C=0.0085
gnomAD - Genomes East Asian Sub 1558 T=1.0000 C=0.0000
gnomAD - Genomes Other Sub 1086 T=0.9475 C=0.0525
gnomAD - Genomes American Sub 848 T=0.987 C=0.013
gnomAD - Genomes Ashkenazi Jewish Sub 290 T=0.983 C=0.017
GO Exome Sequencing Project Global Study-wide 13006 T=0.95756 C=0.04244
GO Exome Sequencing Project European American Sub 8600 T=0.9419 C=0.0581
GO Exome Sequencing Project African American Sub 4406 T=0.9882 C=0.0118
ALFA Total Global 11282 T=0.95036 C=0.04964
ALFA European Sub 8218 T=0.9471 C=0.0529
ALFA Other Sub 2316 T=0.9547 C=0.0453
ALFA African Sub 680 T=0.971 C=0.029
ALFA Asian Sub 62 T=1.00 C=0.00
ALFA South Asian Sub 6 T=1.0 C=0.0
ALFA Latin American 1 Sub 0 T=0 C=0
ALFA Latin American 2 Sub 0 T=0 C=0
1000Genomes Global Study-wide 5008 T=0.9866 C=0.0134
1000Genomes African Sub 1322 T=0.9962 C=0.0038
1000Genomes East Asian Sub 1008 T=1.0000 C=0.0000
1000Genomes Europe Sub 1006 T=0.9523 C=0.0477
1000Genomes South Asian Sub 978 T=0.994 C=0.006
1000Genomes American Sub 694 T=0.988 C=0.012
Genetic variation in the Estonian population Estonian Study-wide 4480 T=0.9098 C=0.0902
The Avon Longitudinal Study of Parents and Children PARENT AND CHILD COHORT Study-wide 3854 T=0.9395 C=0.0605
UK 10K study - Twins TWIN COHORT Study-wide 3708 T=0.9342 C=0.0658
Genome-wide autozygosity in Daghestan Global Study-wide 1136 T=0.9674 C=0.0326
Genome-wide autozygosity in Daghestan Daghestan Sub 628 T=0.959 C=0.041
Genome-wide autozygosity in Daghestan Near_East Sub 144 T=0.965 C=0.035
Genome-wide autozygosity in Daghestan Central Asia Sub 122 T=0.967 C=0.033
Genome-wide autozygosity in Daghestan Europe Sub 108 T=0.991 C=0.009
Genome-wide autozygosity in Daghestan South Asian Sub 98 T=1.00 C=0.00
Genome-wide autozygosity in Daghestan Caucasus Sub 36 T=0.97 C=0.03
Genome of the Netherlands Release 5 Genome of the Netherlands Study-wide 998 T=0.931 C=0.069
Northern Sweden ACPOP Study-wide 600 T=0.950 C=0.050
Medical Genome Project healthy controls from Spanish population Spanish controls Study-wide 534 T=0.961 C=0.039
Qatari Global Study-wide 216 T=0.977 C=0.023
The Danish reference pan genome Danish Study-wide 40 T=0.82 C=0.17
SGDP_PRJ Global Study-wide 20 T=0.50 C=0.50
Siberian Global Study-wide 6 T=0.5 C=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 T= C
GRCh38.p12 chr 3 NC_000003.12:g.120641571= NC_000003.12:g.120641571T>C
GRCh37.p13 chr 3 NC_000003.11:g.120360418= NC_000003.11:g.120360418T>C
HGD RefSeqGene NG_011957.1:g.45911= NG_011957.1:g.45911A>G
HGD transcript NM_000187.3:c.879+18= NM_000187.3:c.879+18A>G
HGD transcript NM_000187.4:c.879+18= NM_000187.4:c.879+18A>G
HGD transcript variant X1 XM_005247412.1:c.654+18= XM_005247412.1:c.654+18A>G
HGD transcript variant X1 XM_005247412.2:c.654+18= XM_005247412.2:c.654+18A>G
HGD transcript variant X2 XM_005247413.1:c.879+18= XM_005247413.1:c.879+18A>G
HGD transcript variant X2 XM_005247413.2:c.879+18= XM_005247413.2:c.879+18A>G
HGD transcript variant X4 XM_011512746.2:c.879+18= XM_011512746.2:c.879+18A>G
HGD transcript variant X3 XM_017006277.2:c.456+18= XM_017006277.2:c.456+18A>G

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#.

37 SubSNP, 18 Frequency submissions
No Submitter Submission ID Date (Build)
1 HGBASE ss2420821 Nov 14, 2000 (89)
2 1000GENOMES ss331004668 May 09, 2011 (134)
3 1000GENOMES ss489894685 May 04, 2012 (137)
4 ILLUMINA ss535761998 Sep 08, 2015 (146)
5 SSMP ss650611984 Apr 25, 2013 (138)
6 NHLBI-ESP ss712547023 Apr 25, 2013 (138)
7 EVA-GONL ss979083713 Aug 21, 2014 (142)
8 JMKIDD_LAB ss1070777212 Aug 21, 2014 (142)
9 1000GENOMES ss1305859362 Aug 21, 2014 (142)
10 HAMMER_LAB ss1397350245 Sep 08, 2015 (146)
11 DDI ss1429564029 Apr 01, 2015 (144)
12 EVA_GENOME_DK ss1580152458 Apr 01, 2015 (144)
13 EVA_DECODE ss1588565920 Apr 01, 2015 (144)
14 EVA_UK10K_ALSPAC ss1608059240 Apr 01, 2015 (144)
15 EVA_UK10K_TWINSUK ss1651053273 Apr 01, 2015 (144)
16 EVA_EXAC ss1687158276 Apr 01, 2015 (144)
17 EVA_MGP ss1711029884 Apr 01, 2015 (144)
18 WEILL_CORNELL_DGM ss1922310038 Feb 12, 2016 (147)
19 JJLAB ss2021722821 Sep 14, 2016 (149)
20 USC_VALOUEV ss2149814956 Dec 20, 2016 (150)
21 HUMAN_LONGEVITY ss2255253122 Dec 20, 2016 (150)
22 TOPMED ss2422577560 Dec 20, 2016 (150)
23 GNOMAD ss2733990278 Nov 08, 2017 (151)
24 GNOMAD ss2747077539 Nov 08, 2017 (151)
25 GNOMAD ss2798279682 Nov 08, 2017 (151)
26 SWEGEN ss2993074307 Nov 08, 2017 (151)
27 TOPMED ss3403597874 Nov 08, 2017 (151)
28 ILLUMINA ss3628759136 Oct 12, 2018 (152)
29 BIOINF_KMB_FNS_UNIBA ss3645739056 Oct 12, 2018 (152)
30 EGCUT_WGS ss3661001021 Jul 13, 2019 (153)
31 EVA_DECODE ss3710145345 Jul 13, 2019 (153)
32 ACPOP ss3730286662 Jul 13, 2019 (153)
33 KHV_HUMAN_GENOMES ss3803735558 Jul 13, 2019 (153)
34 EVA ss3823945403 Apr 25, 2020 (154)
35 EVA ss3825639970 Apr 25, 2020 (154)
36 EVA ss3828038269 Apr 25, 2020 (154)
37 SGDP_PRJ ss3856813828 Apr 25, 2020 (154)
38 1000Genomes NC_000003.11 - 120360418 Oct 12, 2018 (152)
39 The Avon Longitudinal Study of Parents and Children NC_000003.11 - 120360418 Oct 12, 2018 (152)
40 Genome-wide autozygosity in Daghestan NC_000003.10 - 121843108 Apr 25, 2020 (154)
41 Genetic variation in the Estonian population NC_000003.11 - 120360418 Oct 12, 2018 (152)
42 ExAC NC_000003.11 - 120360418 Oct 12, 2018 (152)
43 The Danish reference pan genome NC_000003.11 - 120360418 Apr 25, 2020 (154)
44 gnomAD - Genomes NC_000003.11 - 120360418 Jul 13, 2019 (153)
45 gnomAD - Exomes NC_000003.11 - 120360418 Jul 13, 2019 (153)
46 GO Exome Sequencing Project NC_000003.11 - 120360418 Oct 12, 2018 (152)
47 Genome of the Netherlands Release 5 NC_000003.11 - 120360418 Apr 25, 2020 (154)
48 Medical Genome Project healthy controls from Spanish population NC_000003.11 - 120360418 Apr 25, 2020 (154)
49 Northern Sweden NC_000003.11 - 120360418 Jul 13, 2019 (153)
50 Qatari NC_000003.11 - 120360418 Apr 25, 2020 (154)
51 SGDP_PRJ NC_000003.11 - 120360418 Apr 25, 2020 (154)
52 Siberian NC_000003.11 - 120360418 Apr 25, 2020 (154)
53 TopMed NC_000003.12 - 120641571 Oct 12, 2018 (152)
54 UK 10K study - Twins NC_000003.11 - 120360418 Oct 12, 2018 (152)
55 dbGaP Population Frequency Project NC_000003.12 - 120641571 Apr 25, 2020 (154)

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
326075, ss1397350245, ss1588565920 NC_000003.10:121843107:T:C NC_000003.12:120641570:T:C (self)
17112032, 9532125, 6739269, 7094194, 6317397, 46815207, 3075746, 403710, 4187740, 145716, 3571527, 4351968, 8830808, 2331310, 9532125, ss331004668, ss489894685, ss535761998, ss650611984, ss712547023, ss979083713, ss1070777212, ss1305859362, ss1429564029, ss1580152458, ss1608059240, ss1651053273, ss1687158276, ss1711029884, ss1922310038, ss2021722821, ss2149814956, ss2422577560, ss2733990278, ss2747077539, ss2798279682, ss2993074307, ss3628759136, ss3661001021, ss3730286662, ss3823945403, ss3825639970, ss3828038269, ss3856813828 NC_000003.11:120360417:T:C NC_000003.12:120641570:T:C (self)
261519999, 915768655, ss2255253122, ss3403597874, ss3645739056, ss3710145345, ss3803735558 NC_000003.12:120641570:T:C NC_000003.12:120641570:T:C (self)
ss2420821 NT_005612.16:26855563:T:C NC_000003.12:120641570:T: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 rs1800700


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.post557+f76c771