11-35139361-G-A

Variant summary

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

The NM_000610.4(CD44):c.58G>A(p.Ala20Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000284 in 1,406,842 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: 33)
  • Exomes 𝑓: 0.0000028 (0 hom.)
• Consequence: CD44 NM_000610.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.33

Genes affected

CD44 (HGNC:1681): (CD44 molecule (IN blood group)) The protein encoded by this gene is a cell-surface glycoprotein involved in cell-cell interactions, cell adhesion and migration. It is a receptor for hyaluronic acid (HA) and can also interact with other ligands, such as osteopontin, collagens, and matrix metalloproteinases (MMPs). This protein participates in a wide variety of cellular functions including lymphocyte activation, recirculation and homing, hematopoiesis, and tumor metastasis. Transcripts for this gene undergo complex alternative splicing that results in many functionally distinct isoforms, however, the full length nature of some of these variants has not been determined. Alternative splicing is the basis for the structural and functional diversity of this protein, and may be related to tumor metastasis. [provided by RefSeq, Jul 2008]

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=0.22042671).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CD44	NM_000610.4	c.58G>A	p.Ala20Thr	missense_variant	1/18	ENST00000428726.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CD44	ENST00000428726.8	c.58G>A	p.Ala20Thr	missense_variant	1/18	1	NM_000610.4	A2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000612 AC: 1 AN: 163392 Hom.: 0 AF XY: 0.0000115 AC XY: 1 AN XY: 86594

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 SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000156

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000284 AC: 4 AN: 1406842 Hom.: 0 Cov.: 30 AF XY: 0.00000288 AC XY: 2 AN XY: 694620

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000687

GnomAD4 genome Cov.: 33

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

Aug 04, 2023

The c.58G>A (p.A20T) alteration is located in exon 1 (coding exon 1) of the CD44 gene. This alteration results from a G to A substitution at nucleotide position 58, causing the alanine (A) at amino acid position 20 to be replaced by a threonine (T). 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	Uncertain	0.44
BayesDel_addAF	Benign	-0.072	T
BayesDel_noAF	Benign	-0.34
Cadd	Uncertain	25
Dann	Uncertain	1.0
Eigen	Benign	0.065
Eigen_PC	Benign	0.11
FATHMM_MKL	Benign	0.38	N
LIST_S2	Uncertain	0.91	D;D;D;D;D;D;D;D;D;D
M_CAP	Benign	0.030	D
MetaRNN	Benign	0.22	T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L;L;.;L;.;L;.;L;L;L
MutationTaster	Benign	1.0	N;N;N;N;N;N;N;N;N;N;N;N
PrimateAI	Uncertain	0.63	T
PROVEAN	Uncertain	-3.1	D;D;D;D;.;D;.;D;D;D
REVEL	Benign	0.092
Sift	Benign	0.22	T;T;T;T;.;T;.;T;T;T
Sift4G	Benign	0.21	T;T;T;T;T;T;.;T;T;T
Polyphen		0.23	B;P;.;P;.;P;.;.;P;.
Vest4		0.36
MutPred		0.38		Loss of stability (P = 0.0279);Loss of stability (P = 0.0279);Loss of stability (P = 0.0279);Loss of stability (P = 0.0279);Loss of stability (P = 0.0279);Loss of stability (P = 0.0279);Loss of stability (P = 0.0279);Loss of stability (P = 0.0279);Loss of stability (P = 0.0279);Loss of stability (P = 0.0279);
MVP		0.40
MPC		0.78
ClinPred		0.71	D
GERP RS		3.8
Varity_R		0.27
gMVP		0.54

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

Other links and lift over

dbSNP: rs1383216966; hg19: chr11-35160908;