chr17-48728509-C-G

Position:

• chr17-48728509-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_006361.6(HOXB13):​c.85G>C​(p.Ala29Pro) 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 benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: HOXB13 NM_006361.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 1.73

Genes affected

HOXB13 (HGNC:5112): (homeobox B13) This gene encodes a transcription factor that belongs to the homeobox gene family. Genes of this family are highly conserved among vertebrates and essential for vertebrate embryonic development. This gene has been implicated to play a role in fetal skin development and cutaneous regeneration. In mice, a similar gene was shown to exhibit temporal and spatial colinearity in the main body axis of the embryo, but was not expressed in the secondary axes, which suggests functions in body patterning along the axis. This gene and other HOXB genes form a gene cluster at chromosome the 17q21-22 region. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a chain Homeobox protein Hox-B13 (size 283) in uniprot entity HXB13_HUMAN there are 5 pathogenic changes around while only 2 benign (71%) in NM_006361.6
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.28244495).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HOXB13	NM_006361.6	c.85G>C	p.Ala29Pro	missense_variant	1/2	ENST00000290295.8	NP_006352.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HOXB13	ENST00000290295.8	c.85G>C	p.Ala29Pro	missense_variant	1/2	1	NM_006361.6	ENSP00000290295.8

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Prostate cancer, hereditary, 1 Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Laboratory of Virology, Microbiology, Quality and Medical Biotechnologies, Faculty of Sciences and Techniques - Mohammedia, Hassan II University of Casablanca

-

- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 03, 2022

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. ClinVar contains an entry for this variant (Variation ID: 690975). This variant has not been reported in the literature in individuals affected with HOXB13-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces alanine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 29 of the HOXB13 protein (p.Ala29Pro). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.082
BayesDel_addAF	Benign	-0.019	T
BayesDel_noAF	Benign	-0.26
CADD	Benign	18
DANN	Benign	0.95
DEOGEN2	Benign	0.19	T
Eigen	Benign	-0.30
Eigen_PC	Benign	-0.34
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.043	D
MetaRNN	Benign	0.28	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	1.9	L
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.17
Sift	Benign	0.11	T
Sift4G	Benign	0.16	T
Polyphen		0.64	P
Vest4		0.27
MutPred		0.29		Gain of disorder (P = 0.0412);
MVP		0.84
MPC		0.55
ClinPred		0.46	T
GERP RS		0.082
Varity_R		0.19
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: rs756970136; hg19: chr17-46805871;