Genetic Variant NM_001001995.3:c.723C>T (chrX-13777400-G-A) – ACMG Classification: Benign (-9 pts)

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_ModerateBP6_ModerateBP7BS2

The NM_001001995.3(GPM6B):c.723C>T(p.Pro241Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000065 in 1,199,891 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 24 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., 4 hem., cov: 23)

Exomes 𝑓: 0.000058 ( 0 hom. 20 hem. )

Consequence

GPM6B
NM_001001995.3 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -3.68

Variant links:

Genes affected

GPM6B (HGNC:4461): (glycoprotein M6B) This gene encodes a membrane glycoprotein that belongs to the proteolipid protein family. Proteolipid protein family members are expressed in most brain regions and are thought to be involved in cellular housekeeping functions such as membrane trafficking and cell-to-cell communication. This protein may also be involved in osteoblast differentiation. Alternate splicing results in multiple transcript variants. Pseudogenes of this gene are located on chromosomes Y and 22. [provided by RefSeq, Jan 2016]

GPM6B links:

OFD1 (HGNC:2567): (OFD1 centriole and centriolar satellite protein) This gene is located on the X chromosome and encodes a centrosomal protein. A knockout mouse model has been used to study the effect of mutations in this gene. The mouse gene is also located on the X chromosome, however, unlike the human gene it is not subject to X inactivation. Mutations in this gene are associated with oral-facial-digital syndrome type I and Simpson-Golabi-Behmel syndrome type 2. Many pseudogenes have been identified; a single pseudogene is found on chromosome 5 while as many as fifteen have been found on the Y chromosome. [provided by RefSeq, Aug 2016]

OFD1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.37).

BP6

Variant X-13777400-G-A is Benign according to our data. Variant chrX-13777400-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 2660034.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-3.68 with no splicing effect.

BS2

High Hemizygotes in GnomAd4 at 4 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GPM6B	NM_001001995.3 link	c.723C>T	p.Pro241Pro	synonymous_variant	Exon 6 of 8	ENST00000316715.9	NP_001001995.1	Q13491-4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GPM6B	ENST00000316715.9 link	c.723C>T	p.Pro241Pro	synonymous_variant	Exon 6 of 8	2	NM_001001995.3	ENSP00000316861.4		Q13491-4

Frequencies

GnomAD3 genomes

AF:

0.000134

AC:

AN:

111663

Hom.:

Cov.:

AF XY:

0.000118

AC XY:

AN XY:

33895

show subpopulations

Gnomad AFR

AF:

0.000228

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000758

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000113

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000131

AC:

AN:

183163

Hom.:

AF XY:

0.0000739

AC XY:

AN XY:

67663

show subpopulations

Gnomad AFR exome

AF:

0.000380

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000669

Gnomad EAS exome

AF:

0.0000722

Gnomad SAS exome

AF:

0.000367

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000490

Gnomad OTH exome

AF:

0.000443

GnomAD4 exome

AF:

0.0000579

AC:

AN:

1088228

Hom.:

Cov.:

AF XY:

0.0000565

AC XY:

AN XY:

354154

show subpopulations

Gnomad4 AFR exome

AF:

0.000152

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000518

Gnomad4 EAS exome

AF:

0.0000332

Gnomad4 SAS exome

AF:

0.000130

Gnomad4 FIN exome

AF:

0.0000494

Gnomad4 NFE exome

AF:

0.0000408

Gnomad4 OTH exome

AF:

0.000109

GnomAD4 genome

AF:

0.000134

AC:

AN:

111663

Hom.:

Cov.:

AF XY:

0.000118

AC XY:

AN XY:

33895

show subpopulations

Gnomad4 AFR

AF:

0.000228

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000758

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000113

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000260

Hom.:

Bravo

AF:

0.000125

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Aug 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

GPM6B: BP4, BP7 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.37

CADD

Benign

0.31

DANN

Benign

0.61

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