chr14-44505097-G-A

Position:

• chr14-44505097-G-A

Variant summary

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

The NM_032135.4(FSCB):​c.1891C>T​(p.Pro631Ser) 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. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 28)
  • Exomes 𝑓: 0.0000021 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: FSCB NM_032135.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.367

Genes affected

FSCB (HGNC:20494): (fibrous sheath CABYR binding protein) Predicted to enable calcium ion binding activity. Predicted to be involved in negative regulation of protein sumoylation. Predicted to be active in sperm fibrous sheath and sperm principal piece. [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=0.09077263).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FSCB	NM_032135.4	c.1891C>T	p.Pro631Ser	missense_variant	1/1	ENST00000340446.5	NP_115511.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FSCB	ENST00000340446.5	c.1891C>T	p.Pro631Ser	missense_variant	1/1	6	NM_032135.4	ENSP00000344579.4

Frequencies

GnomAD3 genomes Cov.: 28

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.00000215 AC: 1 AN: 466040 Hom.: 0 Cov.: 0 AF XY: 0.00000402 AC XY: 1 AN XY: 248840

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: 0.0000375

GnomAD4 genome Cov.: 28

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

Apr 06, 2024

The c.1891C>T (p.P631S) alteration is located in exon 1 (coding exon 1) of the FSCB gene. This alteration results from a C to T substitution at nucleotide position 1891, causing the proline (P) at amino acid position 631 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	Benign	0.20
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.72
CADD	Benign	0.30
DANN	Benign	0.60
DEOGEN2	Benign	0.025	T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.6
FATHMM_MKL	Benign	0.012	N
LIST_S2	Benign	0.61	T
M_CAP	Benign	0.0013	T
MetaRNN	Benign	0.091	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.65	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.30	T
PROVEAN	Uncertain	-4.3	D
REVEL	Benign	0.0050
Sift	Uncertain	0.018	D
Sift4G	Uncertain	0.039	D
Polyphen		0.11	B
Vest4		0.057
MutPred		0.30		Gain of phosphorylation at P631 (P = 0.0021);
MVP		0.014
MPC		0.013
ClinPred		0.095	T
GERP RS		-8.6
Varity_R		0.041
gMVP		0.080

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: rs1275380528; hg19: chr14-44974300; COSMIC: COSV100468741; COSMIC: COSV100468741;