16-21258785-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP5

The NM_001376256.1(CRYM):c.941A>C(p.Lys314Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,380 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CRYM NM_001376256.1 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 2.99

Genes affected

CRYM (HGNC:2418): (crystallin mu) Crystallins are separated into two classes: taxon-specific and ubiquitous. The former class is also called phylogenetically-restricted crystallins. The latter class constitutes the major proteins of vertebrate eye lens and maintains the transparency and refractive index of the lens. This gene encodes a taxon-specific crystallin protein that binds NADPH and has sequence similarity to bacterial ornithine cyclodeaminases. The encoded protein does not perform a structural role in lens tissue, and instead it binds thyroid hormone for possible regulatory or developmental roles. Mutations in this gene have been associated with autosomal dominant non-syndromic deafness. [provided by RefSeq, Sep 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 16-21258785-T-G is Pathogenic according to our data. Variant chr16-21258785-T-G is described in ClinVar as [Pathogenic]. Clinvar id is 16935.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr16-21258785-T-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CRYM	NM_001376256.1	c.941A>C	p.Lys314Thr	missense_variant	8/8	ENST00000572914.2
CRYM	NM_001888.5	c.941A>C	p.Lys314Thr	missense_variant	10/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CRYM	ENST00000572914.2	c.941A>C	p.Lys314Thr	missense_variant	8/8	2	NM_001376256.1	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461380 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727048

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

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.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Autosomal dominant nonsyndromic hearing loss 40 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 2003

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
Cadd	Benign	23
Dann	Uncertain	1.0
DEOGEN2	Benign	0.37	T;T
Eigen	Benign	0.13
Eigen_PC	Benign	0.21
FATHMM_MKL	Uncertain	0.96	D
M_CAP	Uncertain	0.085	D
MetaRNN	Uncertain	0.73	D;D
MetaSVM	Benign	-0.40	T
MutationAssessor	Benign	0.0	N;N
MutationTaster	Benign	0.72	A;A;A;A
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-1.0	N;N
REVEL	Uncertain	0.51
Sift	Uncertain	0.025	D;D
Sift4G	Uncertain	0.016	D;D
Polyphen		0.91	P;P
Vest4		0.25
MutPred		0.82		Loss of ubiquitination at K314 (P = 0.0192);Loss of ubiquitination at K314 (P = 0.0192);
MVP		0.82
MPC		0.73
ClinPred		0.73	D
GERP RS		5.5
Varity_R		0.11
gMVP		0.53

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: rs104894512; hg19: chr16-21270106;