chr19-2252576-G-A

Position:

• chr19-2252576-G-A

Variant summary

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

The NM_144616.4(JSRP1):​c.749C>T​(p.Pro250Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,338 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: JSRP1 NM_144616.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.04

Genes affected

JSRP1 (HGNC:24963): (junctional sarcoplasmic reticulum protein 1) The protein encoded by this gene is involved in excitation-contraction coupling at the sarcoplasmic reticulum. The encoded protein can interact with CACNA1S, CACNB1, and calsequestrin to help regulate calcium influx and efflux in skeletal muscle. [provided by RefSeq, Jul 2012]

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=0.08968297).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
JSRP1	NM_144616.4	c.749C>T	p.Pro250Leu	missense_variant	7/7	ENST00000300961.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
JSRP1	ENST00000300961.10	c.749C>T	p.Pro250Leu	missense_variant	7/7	2	NM_144616.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460338 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 726492

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

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

Jul 05, 2023

The c.749C>T (p.P250L) alteration is located in exon 7 (coding exon 6) of the JSRP1 gene. This alteration results from a C to T substitution at nucleotide position 749, causing the proline (P) at amino acid position 250 to be replaced by a leucine (L). 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	0.17
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.73
CADD	Benign	16
DANN	Uncertain	0.99
DEOGEN2	Benign	0.37	T
Eigen	Benign	-0.91
Eigen_PC	Benign	-0.99
FATHMM_MKL	Benign	0.051	N
LIST_S2	Benign	0.46	T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.090	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.81	L
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.30	T
PROVEAN	Uncertain	-4.1	D
REVEL	Benign	0.012
Sift	Uncertain	0.026	D
Sift4G	Uncertain	0.0070	D
Polyphen		0.44	B
Vest4		0.089
MutPred		0.28		Loss of glycosylation at P250 (P = 0.0607);
MVP		0.32
MPC		1.5
ClinPred		0.59	D
GERP RS		-0.93
Varity_R		0.055
gMVP		0.015

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-2252575;