rs141519259

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001003800.2(BICD2):c.203A>G(p.Tyr68Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000136 in 1,392,224 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: not found (cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

BICD2
NM_001003800.2 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 4.80

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

autosomal dominant childhood-onset proximal spinal muscular atrophy with contractures
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp

BICD2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.20268142).

BS2

High AC in GnomAdExome4 at 19 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BICD2	NM_001003800.2 link	c.203A>G	p.Tyr68Cys	missense_variant	Exon 1 of 7	ENST00000356884.11	NP_001003800.1	Q8TD16-2Q96FU2
BICD2	NM_015250.4 link	c.203A>G	p.Tyr68Cys	missense_variant	Exon 1 of 8		NP_056065.1	Q8TD16-1Q96FU2
BICD2	XM_017014551.2 link	c.203A>G	p.Tyr68Cys	missense_variant	Exon 1 of 8		XP_016870040.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BICD2	ENST00000356884.11 link	c.203A>G	p.Tyr68Cys	missense_variant	Exon 1 of 7	1	NM_001003800.2	ENSP00000349351.6		Q8TD16-2
BICD2	ENST00000375512.3 link	c.203A>G	p.Tyr68Cys	missense_variant	Exon 1 of 8	1		ENSP00000364662.3		Q8TD16-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000686

AC:

AN:

145850

AF XY:

0.0000128

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.0000136

AC:

AN:

1392224

Hom.:

Cov.:

AF XY:

0.0000160

AC XY:

AN XY:

686822

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30924

American (AMR)

AF:

0.00

AC:

AN:

34500

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25048

East Asian (EAS)

AF:

0.00

AC:

AN:

35104

South Asian (SAS)

AF:

0.0000128

AC:

AN:

78064

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48238

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5676

European-Non Finnish (NFE)

AF:

0.0000167

AC:

AN:

1076868

Other (OTH)

AF:

0.00

AC:

AN:

57802

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.459

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ESP6500AA

AF:

0.000233

AC:

ESP6500EA

AF:

0.000119

AC:

ExAC

AF:

0.00000908

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jul 15, 2021

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Y68C variant (also known as c.203A>G), located in coding exon 1 of the BICD2 gene, results from an A to G substitution at nucleotide position 203. The tyrosine at codon 68 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is conserved. 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. -

Autosomal dominant childhood-onset proximal spinal muscular atrophy with contractures

Uncertain:1

Jan 14, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 68 of the BICD2 protein (p.Tyr68Cys). This variant has not been reported in the literature in individuals affected with BICD2-related conditions. 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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt BICD2 protein function. ClinVar contains an entry for this variant (Variation ID: 541285). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.089

BayesDel_addAF

Benign

-0.083

BayesDel_noAF

Benign

-0.36

CADD

Pathogenic

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.32

.;T

Eigen

Benign

-0.097

Eigen_PC

Benign

0.093

FATHMM_MKL

Uncertain

0.85

LIST_S2

Uncertain

0.88

D;D

M_CAP

Benign

0.047

MetaRNN

Benign

0.20

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.5

L;L

PhyloP100

4.8

PrimateAI

Pathogenic

0.87

PROVEAN

Uncertain

-3.8

D;D

REVEL

Benign

0.14

Sift

Benign

0.23

T;T

Sift4G

Benign

0.21

T;T

Polyphen

0.0030

B;B

Vest4

0.48

MVP

0.70

MPC

0.70

ClinPred

0.57

GERP RS

4.9

PromoterAI

-0.086

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.65

gMVP

0.53

Mutation Taster

=37/63

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over