5-169864317-G-A

Variant names:

• chr5-169864317-G-A
• rs1009613524
• NM_001129891.3:c.1564C>T

Variant summary

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

The NM_001129891.3(INSYN2B):​c.1564C>T​(p.Arg522Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000696 in 1,551,450 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000046 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000072 (0 hom.)
• Consequence: INSYN2B NM_001129891.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.691

Genes affected

INSYN2B (HGNC:37271): (inhibitory synaptic factor family member 2B)

DOCK2 (HGNC:2988): (dedicator of cytokinesis 2) The protein encoded by this gene belongs to the CDM protein family. It is specifically expressed in hematopoietic cells and is predominantly expressed in peripheral blood leukocytes. The protein is involved in remodeling of the actin cytoskeleton required for lymphocyte migration in response to chemokine signaling. It activates members of the Rho family of GTPases, for example RAC1 and RAC2, by acting as a guanine nucleotide exchange factor (GEF) to exchange bound GDP for free GTP. Mutations in this gene result in immunodeficiency 40 (IMD40), a combined form of immunodeficiency that affects T cell number and function, also with variable defects in B cell and NK cell function. [provided by RefSeq, May 2018]

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=0.23489702).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
INSYN2B	NM_001129891.3	c.1564C>T	p.Arg522Trp	missense_variant	Exon 4 of 4	ENST00000377365.4	NP_001123363.1
DOCK2	NM_004946.3	c.2799+23465G>A		intron_variant	Intron 27 of 51	ENST00000520908.7	NP_004937.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
INSYN2B	ENST00000377365.4	c.1564C>T	p.Arg522Trp	missense_variant	Exon 4 of 4	2	NM_001129891.3	ENSP00000366582.3
DOCK2	ENST00000520908.7	c.2799+23465G>A		intron_variant	Intron 27 of 51	2	NM_004946.3	ENSP00000429283.3

Frequencies

GnomAD3 genomes AF: 0.0000460 AC: 7 AN: 152094 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.000288

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000208

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000321 AC: 5 AN: 155782 Hom.: 0 AF XY: 0.0000121 AC XY: 1 AN XY: 82542

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000405

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000439

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000500

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000722 AC: 101 AN: 1399356 Hom.: 0 Cov.: 32 AF XY: 0.0000710 AC XY: 49 AN XY: 690190

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000560

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000280

Gnomad4 SAS exome AF: 0.0000379

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000825

Gnomad4 OTH exome AF: 0.000103

GnomAD4 genome AF: 0.0000460 AC: 7 AN: 152094 Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4 AN XY: 74290

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.000288

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000208

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000735

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.0000302

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jul 17, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1564C>T (p.R522W) alteration is located in exon 4 (coding exon 3) of the FAM196B gene. This alteration results from a C to T substitution at nucleotide position 1564, causing the arginine (R) at amino acid position 522 to be replaced by a tryptophan (W). 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	Uncertain	0.35
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.32
CADD	Uncertain	26
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.11	T
Eigen	Uncertain	0.21
Eigen_PC	Benign	0.18
FATHMM_MKL	Benign	0.61	D
LIST_S2	Uncertain	0.89	D
M_CAP	Benign	0.029	D
MetaRNN	Benign	0.23	T
MetaSVM	Benign	-0.84	T
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.19
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0060	D
Polyphen		1.0	D
Vest4		0.39
MVP		0.49
ClinPred		0.39	T
GERP RS		1.2
Varity_R		0.13
gMVP		0.19

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: rs1009613524; hg19: chr5-169291321;