Genetic Variant CRNN:p.Glu303Lys (chr1-152410175-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_016190.3(CRNN):c.907G>A(p.Glu303Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000559 in 1,609,816 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000054 ( 0 hom., cov: 30)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CRNN
NM_016190.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.196

Variant links:

Genes affected

CRNN (HGNC:1230): (cornulin) This gene encodes a member of the "fused gene" family of proteins, which contain N-terminus EF-hand domains and multiple tandem peptide repeats. The encoded protein contains two EF-hand Ca2+ binding domains in its N-terminus and two glutamine- and threonine-rich 60 amino acid repeats in its C-terminus. This gene, also known as squamous epithelial heat shock protein 53, may play a role in the mucosal/epithelial immune response and epidermal differentiation. [provided by RefSeq, Jan 2009]

CRNN links:

FLG-AS1 (HGNC:):

FLG-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.10660192).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CRNN	NM_016190.3 link	c.907G>A	p.Glu303Lys	missense_variant	Exon 3 of 3	ENST00000271835.3	NP_057274.1	Q9UBG3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CRNN	ENST00000271835.3 link	c.907G>A	p.Glu303Lys	missense_variant	Exon 3 of 3	1	NM_016190.3	ENSP00000271835.3		Q9UBG3
FLG-AS1	ENST00000411804.1 link	n.95-34669C>T		intron_variant	Intron 1 of 1	3

Frequencies

GnomAD3 genomes

AF:

0.0000540

AC:

AN:

148124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000176

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000679

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251436

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135882

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461692

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727156

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

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

AF:

0.0000540

AC:

AN:

148124

Hom.:

Cov.:

AF XY:

0.0000556

AC XY:

AN XY:

72000

show subpopulations

Gnomad4 AFR

AF:

0.000176

Gnomad4 AMR

AF:

0.0000679

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000329

Hom.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 23, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.907G>A (p.E303K) alteration is located in exon 3 (coding exon 2) of the CRNN gene. This alteration results from a G to A substitution at nucleotide position 907, causing the glutamic acid (E) at amino acid position 303 to be replaced by a lysine (K). 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

0.095

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.65

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.048

Eigen

Benign

-0.37

Eigen_PC

Benign

-0.49

FATHMM_MKL

Benign

0.18

LIST_S2

Benign

0.58

M_CAP

Benign

0.0025

MetaRNN

Benign

0.11

MetaSVM

Benign

-0.99

MutationAssessor

Benign

1.1

PrimateAI

Benign

0.30

PROVEAN

Benign

-1.3

REVEL

Benign

0.040

Sift

Uncertain

0.010

Sift4G

Benign

0.28

Polyphen

0.82

Vest4

0.057

MVP

0.20

MPC

0.27

ClinPred

0.27

GERP RS

3.8

Varity_R

0.069

gMVP

0.44

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over