Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

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.

rs6665822

Current Build 156

Released September 21, 2022

Organism
Homo sapiens
Position
chr1:155130671 (GRCh38.p14) 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.

Alleles
C>A / C>G / C>T
Variation Type
SNV Single Nucleotide Variation
Frequency
C=0.443511 (117393/264690, TOPMED)
A=0.42586 (12039/28270, ALFA)
C=0.06373 (1800/28244, 14KJPN) (+ 16 more)
C=0.06235 (1045/16760, 8.3KJPN)
C=0.3648 (2336/6404, 1000G_30x)
C=0.3608 (1807/5008, 1000G)
A=0.4518 (2024/4480, Estonian)
A=0.4883 (1882/3854, ALSPAC)
A=0.4617 (1712/3708, TWINSUK)
C=0.0829 (243/2930, KOREAN)
C=0.3451 (653/1892, HapMap)
A=0.460 (459/998, GoNL)
A=0.458 (275/600, NorthernSweden)
C=0.235 (107/456, SGDP_PRJ)
A=0.366 (79/216, Qatari)
C=0.173 (37/214, Vietnamese)
C=0.29 (14/48, Siberian)
C=0.50 (20/40, GENOME_DK)
A=0.50 (20/40, GENOME_DK)
Clinical Significance
Not Reported in ClinVar
Gene : Consequence
EFNA1 : Intron Variant
Publications
0 citations
Genomic View
See rs on genome

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: 20230706150541
Population Group Sample Size Ref Allele Alt Allele
Total Global 28364 C=0.57435 A=0.42565, G=0.00000, T=0.00000
European Sub 25644 C=0.57249 A=0.42751, G=0.00000, T=0.00000
African Sub 698 C=0.670 A=0.330, G=0.000, T=0.000
African Others Sub 22 C=0.55 A=0.45, G=0.00, T=0.00
African American Sub 676 C=0.675 A=0.325, G=0.000, T=0.000
Asian Sub 22 C=0.23 A=0.77, G=0.00, T=0.00
East Asian Sub 16 C=0.06 A=0.94, G=0.00, T=0.00
Other Asian Sub 6 C=0.7 A=0.3, G=0.0, T=0.0
Latin American 1 Sub 56 C=0.80 A=0.20, G=0.00, T=0.00
Latin American 2 Sub 148 C=0.649 A=0.351, G=0.000, T=0.000
South Asian Sub 52 C=0.85 A=0.15, G=0.00, T=0.00
Other Sub 1744 C=0.5459 A=0.4541, G=0.0000, T=0.0000


Help

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").

Download
Study Population Group Sample Size Ref Allele Alt Allele
TopMed Global Study-wide 264690 C=0.443511 A=0.556489
Allele Frequency Aggregator Total Global 28270 C=0.57414 A=0.42586, G=0.00000, T=0.00000
Allele Frequency Aggregator European Sub 25568 C=0.57236 A=0.42764, G=0.00000, T=0.00000
Allele Frequency Aggregator Other Sub 1726 C=0.5440 A=0.4560, G=0.0000, T=0.0000
Allele Frequency Aggregator African Sub 698 C=0.670 A=0.330, G=0.000, T=0.000
Allele Frequency Aggregator Latin American 2 Sub 148 C=0.649 A=0.351, G=0.000, T=0.000
Allele Frequency Aggregator Latin American 1 Sub 56 C=0.80 A=0.20, G=0.00, T=0.00
Allele Frequency Aggregator South Asian Sub 52 C=0.85 A=0.15, G=0.00, T=0.00
Allele Frequency Aggregator Asian Sub 22 C=0.23 A=0.77, G=0.00, T=0.00
14KJPN JAPANESE Study-wide 28244 C=0.06373 A=0.93627
8.3KJPN JAPANESE Study-wide 16760 C=0.06235 A=0.93765
1000Genomes_30x Global Study-wide 6404 C=0.3648 A=0.6352
1000Genomes_30x African Sub 1786 C=0.3544 A=0.6456
1000Genomes_30x Europe Sub 1266 C=0.5387 A=0.4613
1000Genomes_30x South Asian Sub 1202 C=0.4676 A=0.5324
1000Genomes_30x East Asian Sub 1170 C=0.0863 A=0.9137
1000Genomes_30x American Sub 980 C=0.365 A=0.635
1000Genomes Global Study-wide 5008 C=0.3608 A=0.6392
1000Genomes African Sub 1322 C=0.3616 A=0.6384
1000Genomes East Asian Sub 1008 C=0.0863 A=0.9137
1000Genomes Europe Sub 1006 C=0.5308 A=0.4692
1000Genomes South Asian Sub 978 C=0.467 A=0.533
1000Genomes American Sub 694 C=0.362 A=0.638
Genetic variation in the Estonian population Estonian Study-wide 4480 C=0.5482 A=0.4518
The Avon Longitudinal Study of Parents and Children PARENT AND CHILD COHORT Study-wide 3854 C=0.5117 A=0.4883
UK 10K study - Twins TWIN COHORT Study-wide 3708 C=0.5383 A=0.4617
KOREAN population from KRGDB KOREAN Study-wide 2930 C=0.0829 A=0.9171, G=0.0000
HapMap Global Study-wide 1892 C=0.3451 A=0.6549
HapMap American Sub 770 C=0.401 A=0.599
HapMap African Sub 692 C=0.325 A=0.675
HapMap Asian Sub 254 C=0.067 A=0.933
HapMap Europe Sub 176 C=0.580 A=0.420
Genome of the Netherlands Release 5 Genome of the Netherlands Study-wide 998 C=0.540 A=0.460
Northern Sweden ACPOP Study-wide 600 C=0.542 A=0.458
SGDP_PRJ Global Study-wide 456 C=0.235 A=0.765
Qatari Global Study-wide 216 C=0.634 A=0.366
A Vietnamese Genetic Variation Database Global Study-wide 214 C=0.173 A=0.827
Siberian Global Study-wide 48 C=0.29 A=0.71
The Danish reference pan genome Danish Study-wide 40 C=0.50 A=0.50
Help

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.p14 chr 1 NC_000001.11:g.155130671C>A
GRCh38.p14 chr 1 NC_000001.11:g.155130671C>G
GRCh38.p14 chr 1 NC_000001.11:g.155130671C>T
GRCh37.p13 chr 1 NC_000001.10:g.155103147C>A
GRCh37.p13 chr 1 NC_000001.10:g.155103147C>G
GRCh37.p13 chr 1 NC_000001.10:g.155103147C>T
Gene: EFNA1, ephrin A1 (plus strand)
Molecule type Change Amino acid[Codon] SO Term
EFNA1 transcript variant 1 NM_004428.3:c.93-668C>A N/A Intron Variant
EFNA1 transcript variant 2 NM_182685.2:c.93-668C>A N/A Intron Variant
Help

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
Help

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 C= A G T
GRCh38.p14 chr 1 NC_000001.11:g.155130671= NC_000001.11:g.155130671C>A NC_000001.11:g.155130671C>G NC_000001.11:g.155130671C>T
GRCh37.p13 chr 1 NC_000001.10:g.155103147= NC_000001.10:g.155103147C>A NC_000001.10:g.155103147C>G NC_000001.10:g.155103147C>T
EFNA1 transcript variant 1 NM_004428.2:c.93-668= NM_004428.2:c.93-668C>A NM_004428.2:c.93-668C>G NM_004428.2:c.93-668C>T
EFNA1 transcript variant 1 NM_004428.3:c.93-668= NM_004428.3:c.93-668C>A NM_004428.3:c.93-668C>G NM_004428.3:c.93-668C>T
EFNA1 transcript variant 2 NM_182685.1:c.93-668= NM_182685.1:c.93-668C>A NM_182685.1:c.93-668C>G NM_182685.1:c.93-668C>T
EFNA1 transcript variant 2 NM_182685.2:c.93-668= NM_182685.2:c.93-668C>A NM_182685.2:c.93-668C>G NM_182685.2:c.93-668C>T
Help

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#.

89 SubSNP, 20 Frequency submissions
No Submitter Submission ID Date (Build)
1 BCM_SSAHASNP ss9827330 Jul 11, 2003 (116)
2 CSHL-HAPMAP ss19834163 Feb 27, 2004 (120)
3 SSAHASNP ss20506554 Apr 05, 2004 (121)
4 ILLUMINA ss75034430 Dec 06, 2007 (129)
5 BCMHGSC_JDW ss87825815 Mar 23, 2008 (129)
6 HUMANGENOME_JCVI ss99251426 Feb 06, 2009 (130)
7 BGI ss102785949 Dec 01, 2009 (131)
8 1000GENOMES ss108602163 Jan 23, 2009 (130)
9 1000GENOMES ss111159362 Jan 25, 2009 (130)
10 ILLUMINA-UK ss119034268 Feb 15, 2009 (130)
11 KRIBB_YJKIM ss119519821 Dec 01, 2009 (131)
12 ENSEMBL ss139415865 Dec 01, 2009 (131)
13 GMI ss155757244 Dec 01, 2009 (131)
14 COMPLETE_GENOMICS ss164127277 Jul 04, 2010 (132)
15 COMPLETE_GENOMICS ss165226341 Jul 04, 2010 (132)
16 COMPLETE_GENOMICS ss167138148 Jul 04, 2010 (132)
17 BUSHMAN ss199090714 Jul 04, 2010 (132)
18 1000GENOMES ss218652944 Jul 14, 2010 (132)
19 1000GENOMES ss230733204 Jul 14, 2010 (132)
20 1000GENOMES ss238380748 Jul 15, 2010 (132)
21 GMI ss276052338 May 04, 2012 (137)
22 GMI ss284153275 Apr 25, 2013 (138)
23 PJP ss290637767 May 09, 2011 (134)
24 ILLUMINA ss482107784 May 04, 2012 (137)
25 ILLUMINA ss484266993 May 04, 2012 (137)
26 ILLUMINA ss536451998 Sep 08, 2015 (146)
27 TISHKOFF ss554699787 Apr 25, 2013 (138)
28 SSMP ss648416106 Apr 25, 2013 (138)
29 ILLUMINA ss780589488 Sep 08, 2015 (146)
30 ILLUMINA ss782579537 Sep 08, 2015 (146)
31 ILLUMINA ss836082351 Sep 08, 2015 (146)
32 EVA-GONL ss975686017 Aug 21, 2014 (142)
33 JMKIDD_LAB ss1068271913 Aug 21, 2014 (142)
34 1000GENOMES ss1292939744 Aug 21, 2014 (142)
35 DDI ss1425979935 Apr 01, 2015 (144)
36 EVA_GENOME_DK ss1574394153 Apr 01, 2015 (144)
37 EVA_DECODE ss1585067673 Apr 01, 2015 (144)
38 EVA_UK10K_ALSPAC ss1601221617 Apr 01, 2015 (144)
39 EVA_UK10K_TWINSUK ss1644215650 Apr 01, 2015 (144)
40 EVA_SVP ss1712371242 Apr 01, 2015 (144)
41 HAMMER_LAB ss1795097205 Sep 08, 2015 (146)
42 WEILL_CORNELL_DGM ss1918919931 Feb 12, 2016 (147)
43 GENOMED ss1966868218 Jul 19, 2016 (147)
44 JJLAB ss2019975437 Sep 14, 2016 (149)
45 ILLUMINA ss2094848755 Dec 20, 2016 (150)
46 ILLUMINA ss2094976661 Dec 20, 2016 (150)
47 USC_VALOUEV ss2148000243 Dec 20, 2016 (150)
48 HUMAN_LONGEVITY ss2166572228 Dec 20, 2016 (150)
49 SYSTEMSBIOZJU ss2624495674 Nov 08, 2017 (151)
50 ILLUMINA ss2632576652 Nov 08, 2017 (151)
51 GRF ss2697973066 Nov 08, 2017 (151)
52 GNOMAD ss2761358091 Nov 08, 2017 (151)
53 AFFY ss2984879621 Nov 08, 2017 (151)
54 AFFY ss2985525260 Nov 08, 2017 (151)
55 SWEGEN ss2987757691 Nov 08, 2017 (151)
56 BIOINF_KMB_FNS_UNIBA ss3023744926 Nov 08, 2017 (151)
57 CSHL ss3343712084 Nov 08, 2017 (151)
58 ILLUMINA ss3626209530 Oct 11, 2018 (152)
59 ILLUMINA ss3630609516 Oct 11, 2018 (152)
60 ILLUMINA ss3641616917 Oct 11, 2018 (152)
61 ILLUMINA ss3642796872 Oct 11, 2018 (152)
62 URBANLAB ss3646791992 Oct 11, 2018 (152)
63 ILLUMINA ss3651471344 Oct 11, 2018 (152)
64 ILLUMINA ss3653648830 Oct 11, 2018 (152)
65 EGCUT_WGS ss3655698259 Jul 12, 2019 (153)
66 EVA_DECODE ss3687789708 Jul 12, 2019 (153)
67 ACPOP ss3727488478 Jul 12, 2019 (153)
68 EVA ss3746812512 Jul 12, 2019 (153)
69 PACBIO ss3783567274 Jul 12, 2019 (153)
70 PACBIO ss3789198625 Jul 12, 2019 (153)
71 PACBIO ss3794070632 Jul 12, 2019 (153)
72 KHV_HUMAN_GENOMES ss3799813598 Jul 12, 2019 (153)
73 EVA ss3826425853 Apr 25, 2020 (154)
74 SGDP_PRJ ss3850013449 Apr 25, 2020 (154)
75 KRGDB ss3895221604 Apr 25, 2020 (154)
76 TOPMED ss4468435002 Apr 25, 2021 (155)
77 TOMMO_GENOMICS ss5146500458 Apr 25, 2021 (155)
78 1000G_HIGH_COVERAGE ss5244305147 Oct 12, 2022 (156)
79 EVA ss5314651331 Oct 12, 2022 (156)
80 EVA ss5322073377 Oct 12, 2022 (156)
81 HUGCELL_USP ss5444897457 Oct 12, 2022 (156)
82 1000G_HIGH_COVERAGE ss5517639752 Oct 12, 2022 (156)
83 SANFORD_IMAGENETICS ss5626598085 Oct 12, 2022 (156)
84 TOMMO_GENOMICS ss5673701726 Oct 12, 2022 (156)
85 YY_MCH ss5801263052 Oct 12, 2022 (156)
86 EVA ss5832670140 Oct 12, 2022 (156)
87 EVA ss5849110097 Oct 12, 2022 (156)
88 EVA ss5910260006 Oct 12, 2022 (156)
89 EVA ss5938392334 Oct 12, 2022 (156)
90 1000Genomes NC_000001.10 - 155103147 Oct 11, 2018 (152)
91 1000Genomes_30x NC_000001.11 - 155130671 Oct 12, 2022 (156)
92 The Avon Longitudinal Study of Parents and Children NC_000001.10 - 155103147 Oct 11, 2018 (152)
93 Genetic variation in the Estonian population NC_000001.10 - 155103147 Oct 11, 2018 (152)
94 The Danish reference pan genome NC_000001.10 - 155103147 Apr 25, 2020 (154)
95 gnomAD - Genomes

Submission ignored due to conflicting rows:
Row 27160119 (NC_000001.11:155130670:C:A 75147/139682)
Row 27160120 (NC_000001.11:155130670:C:T 2/139770)

- Apr 25, 2021 (155)
96 gnomAD - Genomes

Submission ignored due to conflicting rows:
Row 27160119 (NC_000001.11:155130670:C:A 75147/139682)
Row 27160120 (NC_000001.11:155130670:C:T 2/139770)

- Apr 25, 2021 (155)
97 Genome of the Netherlands Release 5 NC_000001.10 - 155103147 Apr 25, 2020 (154)
98 HapMap NC_000001.11 - 155130671 Apr 25, 2020 (154)
99 KOREAN population from KRGDB NC_000001.10 - 155103147 Apr 25, 2020 (154)
100 Northern Sweden NC_000001.10 - 155103147 Jul 12, 2019 (153)
101 Qatari NC_000001.10 - 155103147 Apr 25, 2020 (154)
102 SGDP_PRJ NC_000001.10 - 155103147 Apr 25, 2020 (154)
103 Siberian NC_000001.10 - 155103147 Apr 25, 2020 (154)
104 8.3KJPN NC_000001.10 - 155103147 Apr 25, 2021 (155)
105 14KJPN NC_000001.11 - 155130671 Oct 12, 2022 (156)
106 TopMed NC_000001.11 - 155130671 Apr 25, 2021 (155)
107 UK 10K study - Twins NC_000001.10 - 155103147 Oct 11, 2018 (152)
108 A Vietnamese Genetic Variation Database NC_000001.10 - 155103147 Jul 12, 2019 (153)
109 ALFA NC_000001.11 - 155130671 Apr 25, 2021 (155)
Help

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
ss87825815, ss108602163, ss111159362, ss119034268, ss164127277, ss165226341, ss167138148, ss199090714, ss276052338, ss284153275, ss290637767, ss482107784, ss1585067673, ss1712371242, ss2094848755, ss3642796872 NC_000001.9:153369770:C:A NC_000001.11:155130670:C:A (self)
3732251, 2029618, 1436507, 1709893, 881440, 2398998, 773343, 961861, 2030429, 516597, 4469765, 2029618, 435954, ss218652944, ss230733204, ss238380748, ss484266993, ss536451998, ss554699787, ss648416106, ss780589488, ss782579537, ss836082351, ss975686017, ss1068271913, ss1292939744, ss1425979935, ss1574394153, ss1601221617, ss1644215650, ss1795097205, ss1918919931, ss1966868218, ss2019975437, ss2094976661, ss2148000243, ss2624495674, ss2632576652, ss2697973066, ss2761358091, ss2984879621, ss2985525260, ss2987757691, ss3343712084, ss3626209530, ss3630609516, ss3641616917, ss3651471344, ss3653648830, ss3655698259, ss3727488478, ss3746812512, ss3783567274, ss3789198625, ss3794070632, ss3826425853, ss3850013449, ss3895221604, ss5146500458, ss5314651331, ss5322073377, ss5626598085, ss5832670140, ss5938392334 NC_000001.10:155103146:C:A NC_000001.11:155130670:C:A (self)
5165687, 177181, 7538830, 32041337, 4123254355, ss2166572228, ss3023744926, ss3646791992, ss3687789708, ss3799813598, ss4468435002, ss5244305147, ss5444897457, ss5517639752, ss5673701726, ss5801263052, ss5849110097, ss5910260006 NC_000001.11:155130670:C:A NC_000001.11:155130670:C:A (self)
ss75034430, ss99251426, ss102785949, ss119519821, ss139415865, ss155757244 NT_004487.19:6591788:C:A NC_000001.11:155130670:C:A (self)
ss9827330 NT_004668.15:1552978:C:A NC_000001.11:155130670:C:A (self)
ss19834163, ss20506554 NT_079484.1:1552978:C:A NC_000001.11:155130670:C:A (self)
2398998, ss2761358091, ss3895221604 NC_000001.10:155103146:C:G NC_000001.11:155130670:C:G (self)
4123254355 NC_000001.11:155130670:C:G NC_000001.11:155130670:C:G (self)
4123254355 NC_000001.11:155130670:C:T NC_000001.11:155130670:C:T (self)
Help

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

No publications for rs6665822

Help

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.post761+d5e8e07