8-11543291-T-C

Variant names:

• chr8-11543291-T-C
• rs574731221
• NM_001715.3:c.67T>C

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

The NM_001715.3(BLK):​c.67T>C​(p.Trp23Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000093 in 1,613,722 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: BLK NM_001715.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 1.34
• Publications: 0 publications found

Genes affected

BLK (HGNC:1057): (BLK proto-oncogene, Src family tyrosine kinase) This gene encodes a nonreceptor tyrosine-kinase of the src family of proto-oncogenes that are typically involved in cell proliferation and differentiation. The protein has a role in B-cell receptor signaling and B-cell development. The protein also stimulates insulin synthesis and secretion in response to glucose and enhances the expression of several pancreatic beta-cell transcription factors. [provided by RefSeq, Aug 2010]

BLK Gene-Disease associations (from GenCC):

• maturity-onset diabetes of the young

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• systemic lupus erythematosus

  Inheritance: Unknown Classification: SUPPORTIVE Submitted by: Orphanet
• maturity-onset diabetes of the young type 11

  Inheritance: AD, Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine
• monogenic diabetes

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BS2: High AC in GnomAdExome4 at 11 AD,Unknown gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001715.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BLK	NM_001715.3	MANE Select	c.67T>C	p.Trp23Arg	missense	Exon 2 of 13	NP_001706.2
	BLK	NM_001330465.2		c.-90-2761T>C		intron	N/A	NP_001317394.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BLK	ENST00000259089.9	TSL:1 MANE Select	c.67T>C	p.Trp23Arg	missense	Exon 2 of 13	ENSP00000259089.4	P51451
	BLK	ENST00000855155.1		c.67T>C	p.Trp23Arg	missense	Exon 2 of 13	ENSP00000525214.1
	BLK	ENST00000855156.1		c.67T>C	p.Trp23Arg	missense	Exon 1 of 12	ENSP00000525215.1

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152078 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000200 AC: 5 AN: 250498 AF XY: 0.0000221

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000869

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000753 AC: 11 AN: 1461644 Hom.: 0 Cov.: 35 AF XY: 0.00000825 AC XY: 6 AN XY: 727138

African (AFR) AF: 0.0000299 AC: 1 AN: 33480

American (AMR) AF: 0.0000671 AC: 3 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53184

Middle Eastern (MID) AF: 0.000347 AC: 2 AN: 5768

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1112010

Other (OTH) AF: 0.0000166 AC: 1 AN: 60386

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152078 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74270

African (AFR) AF: 0.00 AC: 0 AN: 41408

American (AMR) AF: 0.00 AC: 0 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3464

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.00 AC: 0 AN: 4812

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10608

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000588 AC: 4 AN: 68006

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.0000179 Hom.: 0

Bravo AF: 0.0000529

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Maturity-onset diabetes of the young type 11 (1)
-	1	-	Monogenic diabetes (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	0.11
CADD	Benign	12
DANN	Benign	0.93
DEOGEN2	Benign	0.050	T
Eigen	Benign	0.16
Eigen_PC	Benign	0.18
FATHMM_MKL	Benign	0.58	D
LIST_S2	Benign	0.28	T
M_CAP	Benign	0.059	D
MetaRNN	Uncertain	0.70	D
MetaSVM	Benign	-0.51	T
MutationAssessor	Benign	0.55	N
PhyloP100		1.3
PrimateAI	Benign	0.40	T
PROVEAN	Benign	0.13	N
REVEL	Uncertain	0.35
Sift	Benign	0.10	T
Sift4G	Benign	0.36	T
Polyphen		1.0	D
Vest4		0.56
MutPred		0.27		Gain of catalytic residue at W23 (P = 0.0217)
MVP		0.92
MPC		0.21
ClinPred		0.30	T
GERP RS		5.2
Varity_R		0.11
gMVP		0.31
Mutation Taster		=89/11	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs574731221; hg19: chr8-11400800;