2-185739439-G-A

Position:

• chr2-185739439-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6_Moderate

The NM_173651.4(FSIP2):​c.193G>A​(p.Ala65Thr) variant causes a missense 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. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: FSIP2 NM_173651.4 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.315

Genes affected

FSIP2 (HGNC:21675): (fibrous sheath interacting protein 2) This gene encodes a protein associated with the sperm fibrous sheath. Genes encoding most of the fibrous-sheath associated proteins genes are transcribed only during the postmeiotic period of spermatogenesis. The protein encoded by this gene is specific to spermatogenic cells. Copy number variation in this gene may be associated with testicular germ cell tumors. Pseudogenes associated with this gene are reported on chromosomes 2 and X. [provided by RefSeq, Aug 2016]

FSIP2-AS2 (HGNC:54061): (FSIP2 antisense RNA 2)

FSIP2-AS1 (HGNC:40978): (FSIP2 antisense RNA 1)

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.029800296).
• BP6: Variant 2-185739439-G-A is Benign according to our data. Variant chr2-185739439-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 3280095.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FSIP2	NM_173651.4	c.193G>A	p.Ala65Thr	missense_variant	2/23	ENST00000424728.6	NP_775922.3
FSIP2-AS2	NR_110217.1	n.99+940C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FSIP2	ENST00000424728.6	c.193G>A	p.Ala65Thr	missense_variant	2/23	5	NM_173651.4	ENSP00000401306	P1
FSIP2-AS2	ENST00000427269.2	n.101+940C>T		intron_variant, non_coding_transcript_variant		5
FSIP2-AS1	ENST00000667756.1	n.37+49327C>T		intron_variant, non_coding_transcript_variant
FSIP2	ENST00000465275.1	n.154G>A		non_coding_transcript_exon_variant	1/2	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 10, 2024

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Benign	-0.36	T
BayesDel_noAF	Benign	-0.76
CADD	Benign	5.1
DANN	Benign	0.72
DEOGEN2	Benign	0.00032	T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.018	N
LIST_S2	Benign	0.58	T
M_CAP	Benign	0.040	D
MetaRNN	Benign	0.030	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-1.8	N
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	1.2	N
REVEL	Benign	0.044
Sift	Benign	1.0	T
Sift4G	Benign	1.0	T
Vest4		0.077
MVP		0.040
ClinPred		0.081	T
GERP RS		-4.7
Varity_R		0.023
gMVP		0.059

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs1691876415; hg19: chr2-186604166;