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Table 1 Validated X-SNPs in the human genome.

From: Human SNPs resulting in premature stop codons and protein truncation

Gene

aGene function

bAccession #

Location

cSNP ID

dFrequency

eHomozygosity

X-SNP

fProtein length (truncation)

gNMD

hCpG

AGT

Cell signalling; hypertension

NM_000029.1

1q42-q43

rs5039

CEPH-MULTI-NATIONAL 184 chr.

G = 1.000 A = 0.000

HYP1-MULTI-NATIONAL 80 chr.

G = 0.950 A = 0.050

n/a

Q53X

485

(89%)

+

+

APOC4

Lipid metabolism

NM_001646.1

19q13.2

rs5164

CEPH-MULTI-NATIONAL 184 chr.

G = 1.000 A = 0.000

HYP1-MULTI-NATIONAL 80 chr.

G = 0.950 A = 0.050

-

W47X

127

(63%)

+

-

CDH15

Cell adhesion; morphogenetic processes

NM_004933.2

16q24.3

rs2270416

JBIC-allele-EAST ASIA 1500 chr. G = 0.826

T = 0.174

n/a

Y788X

814

(3.2%)

-

+

CLCA3

Transport

NM_004921.1

1p31-p22

rs2292830

JBIC-allele -EAST ASIA 1462 chr. G = 0.569

C = 0.431

n/a

Y84X

262

(67.3%)

-

-

CYP2C19

Transport; drug metabolism and synthesis of lipids

NM_000769.1

10q24.

1-q24.3

rs4986893

PAC1-EAST ASIA 46 chr. G = 0.913

A = 0.087

CAUC1-MULTI-NATIONAL 60 chr.

G = 1.000 A = 0.000

AFR1-MULTI-NATIONAL 48 chr. G = 0.979

A = 0.021

HISP1-CENTRAL/SOUTH AMERICA 44

chr. G = 1.000 A = 0.000

P1-MULTI-NATIONAL 198 chr. G = 0.975

A = 0.025

n/a

W212X

446

(52.5%)

-

-

DSCR8

Unknown

NM_032589.2

21q22.2

rs2836172

NCBI|NIHPDR-NORTH AMERICA 20 chr. A = 0.900 T = 0.100

AFD_EUR_PANEL-NORTH

AMERICA 48 chr. A = 1.000

AFD_AFR_PANEL-NORTH AMERICA 46

chr. A = 0.783 T = 0.217

AFD_CHN_PANEL-NORTH

AMERICA 48 chr. A = 0.854 T = 0.146

+

K79X

91

(13.2%)

-

-

EPHX1

Aromatic compound catabolism; xenobiotic metabolism

NM_000120.2

1q42.1

rs4986931

PAC1-EAST ASIA 46 chr. A = 0.978 G = 0.022 P1-MULTI-NATIONAL 202 chr. A = 0.990 G = 0.010 CAUC1-MULTI-NATIONAL 62 chr.

A = 1.000 G = 0.000

AFR1-MULTI-NATIONAL 48 chr. A = 1.000

G = 0.000

HISP1-CENTRAL/SOUTH AMERICA 46 chr. A = 0.978 G = 0.022

-

W97X

455 (78.7%)

+

-

FUT2

Carbohydrate metabolism; protein glycosylation

NM_000511.1

19q|3.3

rs1800030

PAC1-EAST ASIA 48 chr. G = 0.979 A = 0.021 P1-MULTI-NATIONAL 202 chr. G = 0.995

A = 0.005

CAUC1-MULTI-NATIONAL 60 chr. G = 1.000 A = 0.000

AFR1-MULTI-NATIONAL 48 chr.

G = 1.000 A = 0.000

HISP1-CENTRAL/SOUTH AMERICA 46 chr. G = 1.000 A = 0.000

-

W297X

346

(14.2%)

-

-

HPS4

Organelle biogenesis; protein stabilisation/targeting

NM_152843.1

22cen--q|2.3

rs3747129

JBIC-allele-EAST ASIA 1492 chr. G = 0.798 A = 0.202 AFD_EUR_PANEL-NORTH AMERICA 48 chr. G = 0.812 A = 0.188 AFD_AFR_PANEL-NORTH AMERICA 46 chr. G = 0.978 A = 0.022

AFD_CHN_PANEL-NORTH

AMERICA 48 chr. G = 0.750 A = 0.250

HapMap-CEU-EUROPE 120 chr. G = 0.825 A = 0.175

+

R246X

528

(53.4%)

-

+

IL17RB

Immuno-regulatory activity; regulation of cell growth

NM_018725.2

3p2|.1

rs1043261

JBIC-allele-EAST ASIA 1476 chr. C = 0.902 T = 0.098 HapMap-CEU-EUROPE 120 chr. C = 0.908 T = 0.092 AFD_EUR_PANEL-NORTH AMERICA 48 chr. C = 0.938 T = 0.062

AFD_AFR_PANEL-NORTH AMERICA 46

chr. C = 0.978 T = 0.022

AFD_CHN_PANEL-NORTH AMERICA 48

chr. C = 0.792 T = 0.208

+

Q484X

502

(3.6%)

-

+

KRTAP1-1

Cytoskeleton; intermediate filaments

NM_030967.2

17q12-q21

rs3213755

JBIC-allele-EAST ASIA 708 chr. C = 0.617 T = 0.383 HapMap-CEU-EUROPE 120 chr. G = 0.800 A = 0.200

+

Q51X

177

(71.2%)

-

-

LCE5A

Unknown

NM_178438.1

1q21.3

rs2282298

JBIC-allele-EAST ASIA 1504 chr. G = 0.979 A = 0.021 AFD_EUR_PANEL-NORTH

AMERICA 48 chr. C = 1.000

AFD_AFR_PANEL-NORTH

AMERICA 46 chr. C = 1.000

AFD_CHN_PANEL-NORTH

AMERICA 48 chr. C = 0.896 T = 0.104

-

R79X

118

(33.1%)

-

+

LIG4

DNA repair; cell cycle

NM_206937.1

13q33-q34

rs2232636

PAC1-EAST ASIA 46 chr. G = 1.000 A = 0.000 P1-MULTI-NATIONAL 202 chr. G = 0.995 A = 0.005

CAUC1-MULTI-NATIONAL 62 chr.

G = 1.000 A = 0.000

AFR1-MULTI-NATIONAL 48 chr.

G = 0.979 A = 0.021

HISP1-CENTRAL/SOUTH AMERICA 46 chr. G = 1.000 A = 0.000

-

W46X

911

(95%)

-

-

LPL

Lipoprotein metabolism

NM_000237.1

8p22

rs328

WIAF-CSNP-MITOGPOP5-MULTI-NATI-ONAL 112 chr. C = 0.982 G = 0.018 JBIC-allele-EAST ASIA 1458 chr. C = 0.860

G = 0.140

CEPH-MULTI-NATIONAL 184 chr.

C = 0.640G = 0.360

AFD_EUR_PANEL-NORTH AMERICA 44

chr. C = 0.727 G = 0.273

AFD_AFR_PANEL-NORTH AMERICA 42

chr. C = 0.952 G = 0.048

AFD_CHN_PANEL-NORTH AMERICA 46

chr. C = 0.935 G = 0.065

+

S474X

475

(0.2%)

-

-

MAGEE2

Unknown

NM_138703.2

Xq13.3

rs1343879

TSC_42_C-NORTH AMERICA 84 chr. C = 0.950 A = 0.050 C_42_A-EAST ASIA 84 chr. A = 0.650

C = 0.350

TSC_42_AA-NORTHAMERICA 84 chr.

C = 0.950 A = 0.050

HapMap-CEU-EUROPE 120 chr. C = 0.983 A = 0.017

-

E120X

523

(77.1%)

-

-

MS4A12

Signal transduction

NM_017716.1

11q12

rs2298553

JBIC-allele-EAST ASIA 726 chr. C = 0.585 T = 0.415 AFD_EUR_PANEL-NORTH

AMERICA 48 chr. C = 0.583 T = 0.417

AFD_AFR_PANEL-NORTH

AMERICA 42 chr. C = 0.548 T = 0.452

AFD_CHN_PANEL-NORTH

AMERICA 48 chr. C = 0.542 T = 0.458

+

Q71X

267

(73.4%)

+

-

OAS2

Immune response

NM_016817.1

12q24.2

rs15895

POOLED_CEPH-MULTI-NATIONAL 188 chr. A = 0.668 G = 0.332 CEPH-MULTI-NATIONAL 184 chr. C = 0.670 T = 0.330

SC_12_A-EAST ASIA 20 chr. G = 1.000

SC_12_AA-NORTH AMERICA 24 chr.

G = 0.830 A = 0.170

SC_12_C-NORTH AMERICA 24 chr.

G = 0.710 A = 0.290

SC_95_C-NORTH AMERICA 184 chr.

C = 0.590 T = 0.410

AFD_EUR_PANEL-NORTH AMERICA 48

chr. G = 0.562 A = 0.438

AFD_AFR_PANEL-NORTH

AMERICA 46 chr. G = 0.913 A = 0.087

AFD_CHN_PANEL-NORTH

AMERICA 48 chr. G = 1.000

+

W720X

727

(1%)

-

-

OVCH2

Proteolysis

NM_198185.1

11p15.4

rs4509745

HapMap-CEU-EUROPE chr.120 T = 0.658

C = 0.342

HapMap-HCB-EAST ASIA 88 chr. T = 0.705

C = 0.295

HapMap-JPT-EAST ASIA 88 chr. T = 0.614

C = 0.386

HapMap-YRI-WEST AFRICA 120 chr.

C = 0.783 T = 0.217

AFD_EUR_PANEL-NORTH AMERICA 44

chr. T = 0.568 C = 0.432

AFD_AFR_PANEL-NORTH AMERICA 46

chr. C = 0.609 T = 0.391

AFD_CHN_PANEL-NORTH AMERICA 48

chr. T = 0.583 C = 0.417

+

W556X

564

(1.4%)

-

-

POLE2

DNA repair

NM_002692.2

14q21- q22

rs3218790

NIHPDR-NORTH AMERICA 170 chr.

A = 0.988 T = 0.012

HapMap-CEU-EUROPE 120 chr. A = 1.000

HapMap-HCB-EAST ASIA 90 chr. A = 1.000

HapMap-JPT-EAST ASIA 88 chr. A = 1.000

HapMap-YRI-WEST AFRICA 120 chr.

A = 1.000

-

K443X

527

(15.9%)

+

-

SER-PINB11

Serine-type endopeptidase inhibitor activity

NM_080475.1

18

rs4940595

AfAm 12 chr. C = 0.667 A = 0.333

Caucasian 24 chr. A = 0.667 C = 0.333

Asian 12 chr. C = 0.667 A = 0.333

CEPH 12 chr. C = 0.667 A = 0.333

PDpanel 48 chr. A = 0.521 C = 0.479

AFD_EUR_PANEL-NORTH AMERICA 48

chr. T = 0.625 G = 0.375

AFD_AFR_PANEL-NORTH AMERICA 44

chr. G = 0.545 T = 0.455

AFD_CHN_PANEL-NORTH AMERICA 48

chr. G = 0.771 T = 0.229

+

E90X

392

(77%)

+

-

SMUG1

DNA repair

NM_014311.1

12q13.11-q13.3

rs2233919

NIHPDR-NORTH AMERICA 574 chr. C = 0.986 T = 0.014 PDR90 166 chr. C = 0.988 T = 0.012

-

Q3X

270

(98.9%)

+

-

SPTBN5

Actin cytoskeleton organisation and biogenesis

NM_016642.1

15q21

rs2271286

JBIC-allele-EAST ASIA 1482 chr. G = 0.951 A = 0.049

-

Q72X

3674

(98%)

-

-

TAP2

Immune response; protein transport and assembly

NM_000544.2

6p21.3

rs241448

CEPH-MULTI-NATIONAL 184 T = 0.700 C = 0.300 WIAF-CSNP-MITOGPOP5-MULTI-NATI-ONAL 48 chr. T = 0.812 C = 0.188

+

Q687X

703

(2.3%)

-

-

TAAR9

Signal transduction

NM_175057.1

6q23.2

rs2842899

HapMap-CEU-EUROPE 120 chr. T = 0.708 A = 0.292 HapMap-YRI-WEST AFRICA 120 chr. T = 0.883 A = 0.117

AFD_EUR_PANEL-NORTH AMERICA 48

chr. A = 0.812 T = 0.188

AFD_AFR_PANEL-NORTH AMERICA 46

chr. A = 0.783 T = 0.217

AFD_CHN_PANEL-NORTH

AMERICA 48 chr. A = 0.854 T = 0.146

+

Q61X

348

(82.5%)

-

-

TLR5

Immune response

NM_003268.3

1q41-q42

rs5744168

D-0-NORTH AMERICA 48 chr.C = 0.938 T = 0.062 E-0-NORTH AMERICA 40 chr. C = 0.925

T = 0.075

E-1-EUROPE 6 chr. C = 1.000

-

R392X

858

(54.3%)

-

+

TRPM1

Cation transport

NM_002420.3

15q13-q14

rs3784589

JBIC-allele-EAST ASIA 1502 chr. C = 0.965 A = 0.035 HapMap-CEU-EUROPE 120 chr. C = 0.942 A = 0.058

HapMap-HCB-EAST ASIA 90 chr. C = 1.000 HapMap-JPT-EAST ASIA 88 chr. C = 0.955 A = 0.045

HapMap-YRI-WEST AFRICA 118 chr. C = 0.958 A = 0.042

AFD_EUR_PANEL-NORTH AMERICA 48

chr C = 0.917 A = 0.083

AFD_AFR_PANEL-NORTH AMERICA 46

chr. C = 0.913 A = 0.087

AFD_CHN_PANEL-NORTH AMERICA 48

chr. C = 1.000

+

E1305X

1533

(14.9%)

-

-

UNC93A

Unknown

NM_018974.2

6q27

rs2235197

JBIC-allele-EAST ASIA 1484 chr. G = 0.852 A = 0.148

n/a

W151X

456

(66.9%)

-

-

ZNF34

Gene expression

NM_030580.2

8q24.3

rs2294120

JBIC-allele-EAST ASIA 1494 chr. C = 0.729 T = 0.271

n/a

Q56X

549

(89.8%)

+

+

  1. Abbreviation: SNP = single nucleotide polymorphism.
  2. aGene functions are retrieved from the Entrez Gene database of NCBI [30].
  3. bThe accession numbers onto which the SNP-flanking sequences have been located.
  4. cSNP ID corresponds to the dbSNP database SNP identifiers.
  5. dThe frequency information is as posted in dbSNP build 124.
  6. eThis information indicates whether or not a homozygous sample in a sample set was reported for the corresponding X-SNP and was collected from the dbSNP database 'summary of genotypes' section: 'n/a': no information was available, ' + ': homozygous genotype was reported, ' 2 ': no homozygous was reported.
  7. fLength of the wild-type protein products. In parentheses are the percentages of the protein truncation at the C-terminus caused by the X-SNP.
  8. gSNPs that may lead to nonsense-mediated mRNA decay are annotated by ' + '.
  9. hSNPs occurring at CpG dinucleotides and thus can be hot spot mutations are annotated by ' + '.