19-18599736-A-C

Position:

• chr19-18599736-A-C

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM2 PM5 PP3_Strong PP5

The NM_004750.5(CRLF1):​c.226T>G​(p.Trp76Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. W76R) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CRLF1 NM_004750.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1 O:1
• Conservation: PhyloP100: 8.45

Genes affected

CRLF1 (HGNC:2364): (cytokine receptor like factor 1) This gene encodes a member of the cytokine type I receptor family. The protein forms a secreted complex with cardiotrophin-like cytokine factor 1 and acts on cells expressing ciliary neurotrophic factor receptors. The complex can promote survival of neuronal cells. Mutations in this gene result in Crisponi syndrome and cold-induced sweating syndrome. [provided by RefSeq, Oct 2009]

CRLF1 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-18599736-A-G is described in Lovd as [Pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.994
• PP5: Variant 19-18599736-A-C is Pathogenic according to our data. Variant chr19-18599736-A-C is described in ClinVar as [Pathogenic]. Clinvar id is 5708.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr19-18599736-A-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CRLF1	NM_004750.5	c.226T>G	p.Trp76Gly	missense_variant	2/9	ENST00000392386.8	NP_004741.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CRLF1	ENST00000392386.8	c.226T>G	p.Trp76Gly	missense_variant	2/9	1	NM_004750.5	ENSP00000376188.2
CRLF1	ENST00000684169.1	c.226T>G	p.Trp76Gly	missense_variant	2/9			ENSP00000506849.1
CRLF1	ENST00000593286.1	n.478T>G		non_coding_transcript_exon_variant	2/2	4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1 Other:1

Revision: no assertion criteria provided

Submissions by phenotype

Cold-induced sweating syndrome 1 Pathogenic:1 Other:1

Pathogenic, no assertion criteria provided	literature only	OMIM	May 01, 2007	- -
not provided, no classification provided	literature only	GeneReviews	-	Founder variant in Sardinia, the variants c.226T>G and c.676dupA together are the most common in Sardinia, with a joint carrier frequency of 1.4%. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Pathogenic	0.54	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	31
DANN	Uncertain	0.98
DEOGEN2	Pathogenic	0.83	D
Eigen	Uncertain	0.59
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.90	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Benign	1.8	L
PrimateAI	Pathogenic	0.86	D
PROVEAN	Pathogenic	-9.6	D
REVEL	Pathogenic	0.92
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.93
MutPred		0.96		Gain of disorder (P = 0.0013);
MVP		0.97
MPC		1.6
ClinPred		1.0	D
GERP RS		5.2
Varity_R		0.96
gMVP		0.92

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: rs137853143; hg19: chr19-18710546;