17-7580977-G-A

Position:

• chr17-7580977-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The ENST00000250092.11(CD68):​c.842G>A​(p.Ser281Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: CD68 ENST00000250092.11 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.83

Genes affected

CD68 (HGNC:1693): (CD68 molecule) This gene encodes a 110-kD transmembrane glycoprotein that is highly expressed by human monocytes and tissue macrophages. It is a member of the lysosomal/endosomal-associated membrane glycoprotein (LAMP) family. The protein primarily localizes to lysosomes and endosomes with a smaller fraction circulating to the cell surface. It is a type I integral membrane protein with a heavily glycosylated extracellular domain and binds to tissue- and organ-specific lectins or selectins. The protein is also a member of the scavenger receptor family. Scavenger receptors typically function to clear cellular debris, promote phagocytosis, and mediate the recruitment and activation of macrophages. Alternative splicing results in multiple transcripts encoding different isoforms. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.819

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CD68	NM_001251.3	c.842G>A	p.Ser281Asn	missense_variant	5/6	ENST00000250092.11	NP_001242.2
CD68	NM_001040059.2	c.761G>A	p.Ser254Asn	missense_variant	5/6		NP_001035148.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CD68	ENST00000250092.11	c.842G>A	p.Ser281Asn	missense_variant	5/6	1	NM_001251.3	ENSP00000250092	P1
CD68	ENST00000380498.10	c.761G>A	p.Ser254Asn	missense_variant	5/6	1		ENSP00000369867
CD68	ENST00000584180.1	c.248G>A	p.Ser83Asn	missense_variant	3/3	2		ENSP00000462198

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

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

May 27, 2022

The c.842G>A (p.S281N) alteration is located in exon 5 (coding exon 5) of the CD68 gene. This alteration results from a G to A substitution at nucleotide position 842, causing the serine (S) at amino acid position 281 to be replaced by an asparagine (N). 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	0.55
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Uncertain	25
DANN	Benign	0.85
DEOGEN2	Benign	0.26	T;.
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.42
FATHMM_MKL	Benign	0.54	D
LIST_S2	Benign	0.73	T;T
M_CAP	Benign	0.038	D
MetaRNN	Pathogenic	0.82	D;D
MetaSVM	Benign	-0.44	T
MutationAssessor	Uncertain	2.1	M;.
MutationTaster	Benign	0.55	D;D
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-1.4	N;N
REVEL	Benign	0.21
Sift	Uncertain	0.0040	D;T
Sift4G	Uncertain	0.010	D;D
Polyphen		1.0	D;.
Vest4		0.36
MutPred		0.85		Loss of disorder (P = 0.0795);.;
MVP		0.54
MPC		0.47
ClinPred		0.76	D
GERP RS		3.9
Varity_R		0.53
gMVP		0.31

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-7484295;