rs1554709923

Variant names:

• chr9-92764654-G-A
• rs1554709923
• NM_001003800.2:c.91C>T

Your query was ambiguous. Multiple possible variants found:

• chr9-92764654-G-A
• chr9-92764654-G-T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001003800.2(BICD2):​c.91C>T​(p.His31Tyr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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)
• Consequence: BICD2 NM_001003800.2 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 6.08
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17566857).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BICD2	NM_001003800.2	c.91C>T	p.His31Tyr	missense_variant	Exon 1 of 7	ENST00000356884.11	NP_001003800.1
BICD2	NM_015250.4	c.91C>T	p.His31Tyr	missense_variant	Exon 1 of 8		NP_056065.1
BICD2	XM_017014551.2	c.91C>T	p.His31Tyr	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	c.91C>T	p.His31Tyr	missense_variant	Exon 1 of 7	1	NM_001003800.2	ENSP00000349351.6
BICD2	ENST00000375512.3	c.91C>T	p.His31Tyr	missense_variant	Exon 1 of 8	1		ENSP00000364662.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000471 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Autosomal dominant childhood-onset proximal spinal muscular atrophy with contractures Uncertain:2

Feb 12, 2020

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This sequence change replaces histidine with tyrosine at codon 31 of the BICD2 protein (p.His31Tyr). The histidine residue is moderately conserved and there is a moderate physicochemical difference between histidine and tyrosine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with BICD2-related disease. ClinVar contains an entry for this variant (Variation ID: 474282). 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. -

Jun 20, 2022

MGZ Medical Genetics Center

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases Uncertain:1

Mar 22, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.91C>T (p.H31Y) alteration is located in exon 1 (coding exon 1) of the BICD2 gene. This alteration results from a C to T substitution at nucleotide position 91, causing the histidine (H) at amino acid position 31 to be replaced by a tyrosine (Y). 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	0.11
BayesDel_addAF	Benign	-0.091	T
BayesDel_noAF	Benign	-0.37
CADD	Pathogenic	26
DANN	Uncertain	0.98
DEOGEN2	Benign	0.063	.;T
Eigen	Benign	-0.083
Eigen_PC	Benign	0.10
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.97	D;D
M_CAP	Uncertain	0.16	D
MetaRNN	Benign	0.18	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	N;N
PhyloP100		6.1
PrimateAI	Pathogenic	0.86	D
PROVEAN	Benign	-0.99	N;N
REVEL	Benign	0.082
Sift	Uncertain	0.015	D;D
Sift4G	Uncertain	0.024	D;D
Polyphen		0.076	B;B
Vest4		0.32
MutPred		0.22		Gain of methylation at K27 (P = 0.044);Gain of methylation at K27 (P = 0.044);
MVP		0.62
MPC		0.85
ClinPred		0.68	D
GERP RS		4.7
PromoterAI		0.085	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.36
gMVP		0.15
Mutation Taster		=71/29	polymorphism

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

Other links and lift over

dbSNP: rs1554709923; hg19: chr9-95526936;