chr3-124796798-A-G

Position:

• chr3-124796798-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_002213.5(ITGB5):​c.1283T>C​(p.Leu428Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000000688 in 1,453,170 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L428V) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: ITGB5 NM_002213.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.77

Genes affected

ITGB5 (HGNC:6160): (integrin subunit beta 5) This gene encodes a beta subunit of integrin, which can combine with different alpha chains to form a variety of integrin heterodimers. Integrins are integral cell-surface receptors that participate in cell adhesion as well as cell-surface mediated signaling. The alphav beta5 integrin is involved in adhesion to vitronectin. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.819

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITGB5	NM_002213.5	c.1283T>C	p.Leu428Ser	missense_variant	10/15	ENST00000296181.9	NP_002204.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ITGB5	ENST00000296181.9	c.1283T>C	p.Leu428Ser	missense_variant	10/15	1	NM_002213.5	ENSP00000296181	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.88e-7 AC: 1 AN: 1453170 Hom.: 0 Cov.: 33 AF XY: 0.00000139 AC XY: 1 AN XY: 721464

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000167

GnomAD4 genome Cov.: 33

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

Nov 13, 2023

The c.1283T>C (p.L428S) alteration is located in exon 10 (coding exon 10) of the ITGB5 gene. This alteration results from a T to C substitution at nucleotide position 1283, causing the leucine (L) at amino acid position 428 to be replaced by a serine (S). 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	Pathogenic	0.69
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.040
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.83	D;D
Eigen	Benign	0.063
Eigen_PC	Benign	0.073
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.80	T;D
M_CAP	Benign	0.036	D
MetaRNN	Pathogenic	0.82	D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L;.
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-2.2	N;.
REVEL	Pathogenic	0.67
Sift	Uncertain	0.0010	D;.
Sift4G	Uncertain	0.0030	D;.
Polyphen		0.14	B;.
Vest4		0.38
MutPred		0.70		Gain of disorder (P = 0.0054);.;
MVP		0.94
MPC		0.37
ClinPred		0.83	D
GERP RS		2.7
Varity_R		0.14
gMVP		0.86

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs981443715; hg19: chr3-124515645;