chr12-6944532-G-A

Position:

chr12-6944532-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_138425.4(C12orf57):c.109G>A(p.Asp37Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000204 in 1,614,038 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 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000018 ( 0 hom. )

Consequence

C12orf57
NM_138425.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 7.25

Variant links:

Genes affected

C12orf57 (HGNC:29521): (chromosome 12 open reading frame 57) This gene is ubiquitously expressed in human tissues. It is required for development of the human corpus callosum. Mutations in this gene are associated with Temtamy syndrome (TEMTYS). Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Sep 2014]

C12orf57 links:

C12orf57 (HGNC:):

C12orf57 links:

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ACMG classification

Classification made for transcript

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=0.35989472).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
C12orf57	NM_138425.4 linkuse as main transcript	c.109G>A	p.Asp37Asn	missense_variant	2/3	ENST00000229281.6	NP_612434.1	Q99622

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
C12orf57	ENST00000229281.6 linkuse as main transcript	c.109G>A	p.Asp37Asn	missense_variant	2/3	1	NM_138425.4	ENSP00000229281.5		Q99622

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152272

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.000478

GnomAD3 exomes

AF:

0.0000359

AC:

AN:

251018

Hom.:

AF XY:

0.0000295

AC XY:

AN XY:

135822

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

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:

0.0000353

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000185

AC:

AN:

1461648

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

727132

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000157

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:

0.0000153

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152390

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74528

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.000131

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:

0.000473

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000793

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Oct 12, 2023

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Temtamy syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 08, 2024

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 37 of the C12orf57 protein (p.Asp37Asn). This variant is present in population databases (rs782238229, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with C12orf57-related conditions. ClinVar contains an entry for this variant (Variation ID: 575129). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.094

BayesDel_noAF

Benign

-0.15

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.24

T;T;T;T;T

Eigen

Uncertain

0.27

Eigen_PC

Uncertain

0.33

FATHMM_MKL

Uncertain

0.78

LIST_S2

Uncertain

0.90

.;D;D;D;D

M_CAP

Uncertain

0.095

MetaRNN

Benign

0.36

T;T;T;T;T

MetaSVM

Uncertain

-0.14

MutationAssessor

Benign

1.1

L;.;.;L;.

PROVEAN

Benign

-1.4

N;.;N;N;.

REVEL

Uncertain

0.36

Sift

Benign

0.16

T;.;D;T;.

Sift4G

Benign

0.072

T;D;T;T;T

Polyphen

0.018

B;.;D;B;.

Vest4

0.29, 0.45, 0.35, 0.34

MutPred

0.23

Loss of disorder (P = 0.2088);Loss of disorder (P = 0.2088);Loss of disorder (P = 0.2088);Loss of disorder (P = 0.2088);.;

MVP

0.87

MPC

0.18

ClinPred

0.71

GERP RS

3.7

Varity_R

0.40

gMVP

0.28

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