12-53191634-G-C

Position:

• chr12-53191634-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000889.3(ITGB7):​c.2319C>G​(p.Asp773Glu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ITGB7 NM_000889.3 missense, splice_region
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0480

Genes affected

ITGB7 (HGNC:6162): (integrin subunit beta 7) This gene encodes a protein that is a member of the integrin superfamily. Members of this family are adhesion receptors that function in signaling from the extracellular matrix to the cell. Integrins are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain. The encoded protein forms dimers with an alpha4 chain or an alphaE chain and plays a role in leukocyte adhesion. Dimerization with alpha4 forms a homing receptor for migration of lymphocytes to the intestinal mucosa and Peyer's patches. Dimerization with alphaE permits binding to the ligand epithelial cadherin, a calcium-dependent adhesion molecule. Alternate splicing results in multiple transcript variants. Additional alternatively spliced transcript variants of this gene have been described, but their full-length nature is not known. [provided by RefSeq, Sep 2013]

ZNF740 (HGNC:27465): (zinc finger protein 740) Enables sequence-specific double-stranded DNA binding activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Predicted to be located in nucleus. Predicted to be part of chromatin. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.083104074).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ITGB7	NM_000889.3	c.2319C>G	p.Asp773Glu	missense_variant, splice_region_variant	16/16	ENST00000267082.10
ZNF740	NM_001004304.4	c.*4044G>C		3_prime_UTR_variant	7/7	ENST00000416904.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ITGB7	ENST00000267082.10	c.2319C>G	p.Asp773Glu	missense_variant, splice_region_variant	16/16	1	NM_000889.3	P1
ZNF740	ENST00000416904.5	c.*4044G>C		3_prime_UTR_variant	7/7	1	NM_001004304.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251450 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135906

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000189

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 06, 2022

The c.2319C>G (p.D773E) alteration is located in exon 16 (coding exon 14) of the ITGB7 gene. This alteration results from a C to G substitution at nucleotide position 2319, causing the aspartic acid (D) at amino acid position 773 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	14
DANN	Benign	0.90
DEOGEN2	Benign	0.31	T;T;.
Eigen	Benign	-0.51
Eigen_PC	Benign	-0.41
FATHMM_MKL	Benign	0.65	D
M_CAP	Benign	0.030	D
MetaRNN	Benign	0.083	T;T;T
MetaSVM	Benign	-0.62	T
MutationAssessor	Benign	0.97	L;L;.
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.84	N;N;.
REVEL	Benign	0.16
Sift	Benign	0.62	T;T;.
Sift4G	Benign	0.22	T;T;T
Polyphen		0.0	B;B;.
Vest4		0.045
MutPred		0.46		Gain of disorder (P = 0.1323);Gain of disorder (P = 0.1323);.;
MVP		0.81
MPC		0.28
ClinPred		0.065	T
GERP RS		2.2
Varity_R		0.047
gMVP		0.23

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.080		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs369869580; hg19: chr12-53585418;