5-140194622-G-A

Variant names:

• chr5-140194622-G-A
• rs1295169435
• NM_032412.4:c.157G>A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_032412.4(CYSTM1):​c.157G>A​(p.Gly53Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000657 in 152,178 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 0.0000066 (0 hom., cov: 32)
• Consequence: CYSTM1 NM_032412.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.47

Genes affected

CYSTM1 (HGNC:30239): (cysteine rich transmembrane module containing 1) Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2825777).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYSTM1	NM_032412.4	c.157G>A	p.Gly53Ser	missense_variant	Exon 2 of 3	ENST00000261811.6	NP_115788.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYSTM1	ENST00000261811.6	c.157G>A	p.Gly53Ser	missense_variant	Exon 2 of 3	1	NM_032412.4	ENSP00000261811.4

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152178 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152178 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74350

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Apr 08, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.157G>A (p.G53S) alteration is located in exon 2 (coding exon 1) of the CYSTM1 gene. This alteration results from a G to A substitution at nucleotide position 157, causing the glycine (G) at amino acid position 53 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	0.31
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.041	T;.
Eigen	Uncertain	0.33
Eigen_PC	Uncertain	0.42
FATHMM_MKL	Benign	0.75	D
LIST_S2	Uncertain	0.86	D;D
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.28	T;T
MetaSVM	Benign	-0.99	T
PrimateAI	Uncertain	0.51	T
PROVEAN	Uncertain	-3.0	D;.
REVEL	Benign	0.11
Sift	Benign	0.048	D;.
Sift4G	Uncertain	0.057	T;.
Polyphen		0.63	P;.
Vest4		0.35
MutPred		0.21		Gain of glycosylation at G53 (P = 9e-04);Gain of glycosylation at G53 (P = 9e-04);
MVP		0.59
MPC		0.15
ClinPred		0.98	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.23
gMVP		0.70

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: rs1295169435; hg19: chr5-139574207;