20-20037528-T-C

Position:

• chr20-20037528-T-C

Variant summary

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

The NM_001278628.2(CRNKL1):​c.1691A>G​(p.Glu564Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CRNKL1 NM_001278628.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.08

Genes affected

CRNKL1 (HGNC:15762): (crooked neck pre-mRNA splicing factor 1) The crooked neck (crn) gene of Drosophila is essential for embryogenesis and is thought to be involved in cell cycle progression and pre-mRNA splicing. A protein encoded by this human locus has been found to localize to pre-mRNA splicing complexes in the nucleus and is necessary for pre-mRNA splicing. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jul 2013]

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=0.2070725).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CRNKL1	NM_001278628.2	c.1691A>G	p.Glu564Gly	missense_variant	13/14	ENST00000536226.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CRNKL1	ENST00000536226.2	c.1691A>G	p.Glu564Gly	missense_variant	13/14	1	NM_001278628.2	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

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

Jan 31, 2023

The c.2174A>G (p.E725G) alteration is located in exon 14 (coding exon 14) of the CRNKL1 gene. This alteration results from a A to G substitution at nucleotide position 2174, causing the glutamic acid (E) at amino acid position 725 to be replaced by a glycine (G). 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	0.11
BayesDel_addAF	Benign	-0.035	T
BayesDel_noAF	Benign	-0.29
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.060	T;T;.
Eigen	Benign	0.0067
Eigen_PC	Benign	0.18
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.60	T;T;T
M_CAP	Benign	0.0073	T
MetaRNN	Benign	0.21	T;T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.2	.;M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Benign	0.42	T
PROVEAN	Uncertain	-3.5	D;D;D
REVEL	Benign	0.11
Sift	Uncertain	0.019	D;D;T
Sift4G	Uncertain	0.050	T;D;T
Polyphen		0.0040	.;B;.
Vest4		0.38
MutPred		0.31		.;Gain of glycosylation at S722 (P = 0.0479);.;
MVP		0.38
MPC		0.32
ClinPred		0.97	D
GERP RS		5.0
Varity_R		0.38
gMVP		0.31

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs111503447; hg19: chr20-20018172; COSMIC: COSV100131415; COSMIC: COSV100131415;