7-27143336-G-A

Position:

• chr7-27143336-G-A

Variant summary

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

The NM_019102.4(HOXA5):​c.272C>T​(p.Thr91Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000139 in 1,442,392 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: HOXA5 NM_019102.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.41

Genes affected

HOXA5 (HGNC:5106): (homeobox A5) In vertebrates, the genes encoding the class of transcription factors called homeobox genes are found in clusters named A, B, C, and D on four separate chromosomes. Expression of these proteins is spatially and temporally regulated during embryonic development. This gene is part of the A cluster on chromosome 7 and encodes a DNA-binding transcription factor which may regulate gene expression, morphogenesis, and differentiation. Methylation of this gene may result in the loss of its expression and, since the encoded protein upregulates the tumor suppressor p53, this protein may play an important role in tumorigenesis. [provided by RefSeq, Jul 2008]

HOXA3 (HGNC:5104): (homeobox A3) In vertebrates, the genes encoding the class of transcription factors called homeobox genes are found in clusters named A, B, C, and D on four separate chromosomes. Expression of these proteins is spatially and temporally regulated during embryonic development. This gene is part of the A cluster on chromosome 7 and encodes a DNA-binding transcription factor which may regulate gene expression, morphogenesis, and differentiation. Three transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ENSG00000273433 (HGNC:):

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
HOXA5	NM_019102.4	c.272C>T	p.Thr91Met	missense_variant	1/2	ENST00000222726.4	NP_061975.2
HOXA3	NM_153631.3	c.-493-3150C>T		intron_variant		ENST00000612286.5	NP_705895.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HOXA5	ENST00000222726.4	c.272C>T	p.Thr91Met	missense_variant	1/2	1	NM_019102.4	ENSP00000222726.3
HOXA3	ENST00000612286.5	c.-493-3150C>T		intron_variant		2	NM_153631.3	ENSP00000484411.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000139 AC: 2 AN: 1442392 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 716810

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: 0.00000181

Gnomad4 OTH exome AF: 0.00

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

Oct 24, 2024

The c.272C>T (p.T91M) alteration is located in exon 1 (coding exon 1) of the HOXA5 gene. This alteration results from a C to T substitution at nucleotide position 272, causing the threonine (T) at amino acid position 91 to be replaced by a methionine (M). 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	0.12
BayesDel_addAF	Uncertain	0.099	D
BayesDel_noAF	Benign	-0.10
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.44	T
Eigen	Uncertain	0.21
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.92	D
M_CAP	Pathogenic	0.91	D
MetaRNN	Uncertain	0.52	D
MetaSVM	Uncertain	0.32	D
MutationAssessor	Benign	1.8	L
PrimateAI	Pathogenic	0.80	T
PROVEAN	Benign	-1.1	N
REVEL	Uncertain	0.41
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.048	D
Polyphen		0.56	P
Vest4		0.47
MutPred		0.38		Loss of phosphorylation at T91 (P = 0.0047);
MVP		0.69
MPC		1.4
ClinPred		0.82	D
GERP RS		4.5
Varity_R		0.12
gMVP		0.36

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: chr7-27182955; COSMIC: COSV56073592; COSMIC: COSV56073592;