rs146113445

chr9-92719168-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 1P and 7B. PP2BP4_ModerateBP6BS2

The NM_001003800.2(BICD2):c.1477C>T(p.Arg493Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000036 in 1,611,002 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R493H) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000037 ( 0 hom. )

Consequence

BICD2
NM_001003800.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:1

Conservation

PhyloP100: 0.222

Variant links:

Genes affected

BICD2 (HGNC:17208): (BICD cargo adaptor 2) This gene is one of two human homologs of Drosophila bicaudal-D and a member of the Bicoid family. It has been implicated in dynein-mediated, minus end-directed motility along microtubules. It has also been reported to be a phosphorylation target of NIMA related kinase 8. Two alternative splice variants have been described. [provided by RefSeq, Jul 2008]

BICD2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PP2

Missense variant where missense usually causes diseases, BICD2

BP4

Computational evidence support a benign effect (MetaRNN=0.13510805).

BP6

Variant 9-92719168-G-A is Benign according to our data. Variant chr9-92719168-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 541283.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}.

BS2

High AC in GnomAdExome at 21 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
BICD2	NM_001003800.2 linkuse as main transcript	c.1477C>T	p.Arg493Cys	missense_variant	5/7	ENST00000356884.11
BICD2	NM_015250.4 linkuse as main transcript	c.1477C>T	p.Arg493Cys	missense_variant	5/8
BICD2	XM_017014551.2 linkuse as main transcript	c.1558C>T	p.Arg520Cys	missense_variant	5/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BICD2	ENST00000356884.11 linkuse as main transcript	c.1477C>T	p.Arg493Cys	missense_variant	5/7	1	NM_001003800.2	A2	Q8TD16-2
BICD2	ENST00000375512.3 linkuse as main transcript	c.1477C>T	p.Arg493Cys	missense_variant	5/8	1		P4	Q8TD16-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000843

AC:

AN:

249066

Hom.:

AF XY:

0.000111

AC XY:

AN XY:

134986

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000159

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000370

AC:

AN:

1458790

Hom.:

Cov.:

AF XY:

0.0000455

AC XY:

AN XY:

725862

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.0000198

Gnomad4 NFE exome

AF:

0.0000396

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000662

Hom.:

Bravo

AF:

0.0000264

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000107

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Autosomal dominant childhood-onset proximal spinal muscular atrophy with contractures

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Invitae	Dec 26, 2023	- -
Uncertain significance, no assertion criteria provided	research	Lupski Lab, Baylor-Hopkins CMG, Baylor College of Medicine	-	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 13, 2020

The p.R493C variant (also known as c.1477C>T), located in coding exon 5 of the BICD2 gene, results from a C to T substitution at nucleotide position 1477. The arginine at codon 493 is replaced by cysteine, an amino acid with highly dissimilar properties. This variant has been detected in heterozygous or homozygous state in two members of a family affected with arthrogryposis, developmental delay, and multiple congenital anomalies (Bayram Y et al. J. Clin. Invest., 2016 Feb;126:762-78). However, these individuals were also carriers of a pathogenic variant in another gene and therefore the contribution of this BICD2 variant towards the disease phenotype is uncertain. This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jan 19, 2022

Observed in both a homozygous and heterozygous state in siblings with joint contractures and multiple congenital anomalies who also harbored other variants related to the phenotype (Bayram Y et al., 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 26752647, 28166811) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.092

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.54

Cadd

Benign

Dann

Uncertain

1.0

Eigen

Benign

-0.33

Eigen_PC

Benign

-0.25

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.82

T;T

M_CAP

Benign

0.046

MetaRNN

Benign

0.14

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.5

M;M

MutationTaster

Benign

0.99

D;D

PrimateAI

Benign

0.21

PROVEAN

Uncertain

-4.0

D;D

REVEL

Benign

0.066

Sift

Benign

0.061

T;T

Sift4G

Uncertain

0.013

D;D

Polyphen

0.0090

B;B

Vest4

0.24

MVP

0.58

MPC

0.75

ClinPred

0.36

GERP RS

-0.21

Varity_R

0.14

gMVP

0.50

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