3-49172903-C-T

Variant names:

• chr3-49172903-C-T
• NM_173546.3:c.134C>T

Variant summary

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

The NM_173546.3(KLHDC8B):​c.134C>T​(p.Pro45Leu) variant causes a missense change involving the alteration of a 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: 33)
• Consequence: KLHDC8B NM_173546.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.54

Genes affected

KLHDC8B (HGNC:28557): (kelch domain containing 8B) This gene encodes a protein which forms a distinct beta-propeller protein structure of kelch domains allowing for protein-protein interactions. Mutations in this gene have been associated with Hodgkin lymphoma. [provided by RefSeq, Sep 2010]

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, 0.78

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KLHDC8B	NM_173546.3	c.134C>T	p.Pro45Leu	missense_variant	Exon 2 of 6	ENST00000332780.4	NP_775817.1
KLHDC8B	XM_006713015.4	c.134C>T	p.Pro45Leu	missense_variant	Exon 2 of 6		XP_006713078.1
KLHDC8B	XM_006713016.4	c.134C>T	p.Pro45Leu	missense_variant	Exon 2 of 6		XP_006713079.1
KLHDC8B	XM_005264938.4	c.134C>T	p.Pro45Leu	missense_variant	Exon 2 of 6		XP_005264995.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KLHDC8B	ENST00000332780.4	c.134C>T	p.Pro45Leu	missense_variant	Exon 2 of 6	1	NM_173546.3	ENSP00000327468.2
KLHDC8B	ENST00000476495.2	n.191C>T		non_coding_transcript_exon_variant	Exon 1 of 3	2
KLHDC8B	ENST00000459846.6	n.230+102C>T		intron_variant	Intron 2 of 4	3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Dec 04, 2022

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 are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. This variant has not been reported in the literature in individuals affected with KLHDC8B-related conditions. This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 45 of the KLHDC8B protein (p.Pro45Leu). This variant is not present in population databases (gnomAD no frequency). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.74
BayesDel_addAF	Benign	-0.066	T
BayesDel_noAF	Benign	-0.33
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.58	D
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.87	D
M_CAP	Benign	0.047	D
MetaRNN	Pathogenic	0.78	D
MetaSVM	Benign	-0.73	T
MutationAssessor	Benign	1.6	L
PrimateAI	Uncertain	0.73	T
PROVEAN	Pathogenic	-5.0	D
REVEL	Uncertain	0.37
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0060	D
Polyphen		1.0	D
Vest4		0.42
MutPred		0.80		Loss of disorder (P = 0.0899);
MVP		0.70
MPC		1.2
ClinPred		1.0	D
GERP RS		5.3
Varity_R		0.61
gMVP		0.66

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-49210336;