3-112336011-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005944.7(CD200):c.12+2787T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. 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: CD200 NM_005944.7 intron
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.267

Genes affected

CD200 (HGNC:7203): (CD200 molecule) This gene encodes a type I membrane glycoprotein containing two extracellular immunoglobulin domains, a transmembrane and a cytoplasmic domain. This gene is expressed by various cell types, including B cells, a subset of T cells, thymocytes, endothelial cells, and neurons. The encoded protein plays an important role in immunosuppression and regulation of anti-tumor activity. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09798813).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CD200	NM_005944.7	c.12+2787T>A		intron_variant		ENST00000315711.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CD200	ENST00000315711.12	c.12+2787T>A		intron_variant		1	NM_005944.7	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 29, 2021

The c.81T>A (p.D27E) alteration is located in exon 2 (coding exon 2) of the CD200 gene. This alteration results from a T to A substitution at nucleotide position 81, causing the aspartic acid (D) at amino acid position 27 to be replaced by a glutamic acid (E). 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
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
Cadd	Benign	6.9
Dann	Benign	0.75
Eigen	Benign	-0.82
Eigen_PC	Benign	-0.94
FATHMM_MKL	Benign	0.023	N
LIST_S2	Benign	0.34	T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.098	T
MetaSVM	Benign	-0.86	T
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.16	N
REVEL	Benign	0.12
Sift	Pathogenic	0.0	D
Polyphen		0.072	B
Vest4		0.14
MutPred		0.49		Gain of sheet (P = 0.0149);
MVP		0.68
MPC		0.18
ClinPred		0.68	D
GERP RS		1.7
gMVP		0.27

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs1576581831; hg19: chr3-112054858;