7-142942466-G-T

Position:

• chr7-142942466-G-T

Variant summary

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

The NM_000420.3(KEL):​c.2005C>A​(p.Pro669Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KEL NM_000420.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.40

Genes affected

KEL (HGNC:6308): (Kell metallo-endopeptidase (Kell blood group)) This gene encodes a type II transmembrane glycoprotein that is the highly polymorphic Kell blood group antigen. The Kell glycoprotein links via a single disulfide bond to the XK membrane protein that carries the Kx antigen. The encoded protein contains sequence and structural similarity to members of the neprilysin (M13) family of zinc endopeptidases. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KEL	NM_000420.3	c.2005C>A	p.Pro669Thr	missense_variant	18/19	ENST00000355265.7	NP_000411.1
KEL	XM_005249993.2	c.2041C>A	p.Pro681Thr	missense_variant	18/19		XP_005250050.1
KEL	XM_047420357.1	c.1894C>A	p.Pro632Thr	missense_variant	17/18		XP_047276313.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KEL	ENST00000355265.7	c.2005C>A	p.Pro669Thr	missense_variant	18/19	1	NM_000420.3	ENSP00000347409.2
KEL	ENST00000470850.1	n.305C>A		non_coding_transcript_exon_variant	4/4	2
KEL	ENST00000478969.1	n.344C>A		non_coding_transcript_exon_variant	2/2	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000113

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

Dec 05, 2022

The c.2005C>A (p.P669T) alteration is located in exon 18 (coding exon 18) of the KEL gene. This alteration results from a C to A substitution at nucleotide position 2005, causing the proline (P) at amino acid position 669 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	Benign	0.14
BayesDel_addAF	Uncertain	0.089	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.35	T
Eigen	Benign	0.19
Eigen_PC	Benign	0.17
FATHMM_MKL	Benign	0.64	D
LIST_S2	Benign	0.79	T
M_CAP	Benign	0.085	D
MetaRNN	Uncertain	0.55	D
MetaSVM	Uncertain	-0.024	T
MutationAssessor	Pathogenic	3.2	M
PrimateAI	Benign	0.37	T
PROVEAN	Uncertain	-2.7	D
REVEL	Uncertain	0.46
Sift	Benign	0.074	T
Sift4G	Benign	0.22	T
Polyphen		0.67	P
Vest4		0.49
MutPred		0.58		Gain of catalytic residue at P669 (P = 0.0916);
MVP		0.97
MPC		0.23
ClinPred		0.94	D
GERP RS		3.4
Varity_R		0.22
gMVP		0.26

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: rs751310423; hg19: chr7-142639553; COSMIC: COSV100786913; COSMIC: COSV100786913;