12-54028884-G-T

Variant names:

• chr12-54028884-G-T
• NM_004503.4:c.363G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_004503.4(HOXC6):​c.363G>T​(p.Gln121His) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: HOXC6 NM_004503.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.01
• Publications: 0 publications found

Genes affected

HOXC6 (HGNC:5128): (homeobox C6) This gene belongs to the homeobox family, members of which encode a highly conserved family of transcription factors that play an important role in morphogenesis in all multicellular organisms. Mammals possess four similar homeobox gene clusters, HOXA, HOXB, HOXC and HOXD, which are located on different chromosomes and consist of 9 to 11 genes arranged in tandem. This gene, HOXC6, is one of several HOXC genes located in a cluster on chromosome 12. Three genes, HOXC5, HOXC4 and HOXC6, share a 5' non-coding exon. Transcripts may include the shared exon spliced to the gene-specific exons, or they may include only the gene-specific exons. Alternatively spliced transcript variants encoding different isoforms have been identified for HOXC6. Transcript variant two includes the shared exon, and transcript variant one includes only gene-specific exons. [provided by RefSeq, Jul 2008]

HOXC4 (HGNC:5126): (homeobox C4) This gene belongs to the homeobox family of genes. The homeobox genes encode a highly conserved family of transcription factors that play an important role in morphogenesis in all multicellular organisms. Mammals possess four similar homeobox gene clusters, HOXA, HOXB, HOXC and HOXD, which are located on different chromosomes and consist of 9 to 11 genes arranged in tandem. This gene, HOXC4, is one of several homeobox HOXC genes located in a cluster on chromosome 12. Three genes, HOXC5, HOXC4 and HOXC6, share a 5' non-coding exon. Transcripts may include the shared exon spliced to the gene-specific exons, or they may include only the gene-specific exons. Two alternatively spliced variants that encode the same protein have been described for HOXC4. Transcript variant one includes the shared exon, and transcript variant two includes only gene-specific exons. [provided by RefSeq, Jul 2008]

ENSG00000273049 (HGNC:):

HOXC5 (HGNC:5127): (homeobox C5) This gene belongs to the homeobox family of genes. The homeobox genes encode a highly conserved family of transcription factors that play an important role in morphogenesis in all multicellular organisms. Mammals possess four similar homeobox gene clusters, HOXA, HOXB, HOXC and HOXD, which are located on different chromosomes and consist of 9 to 11 genes arranged in tandem. This gene, HOXC5, is one of several homeobox HOXC genes located in a cluster on chromosome 12. Three genes, HOXC5, HOXC4 and HOXC6, share a 5' non-coding exon. Transcripts may include the shared exon spliced to the gene-specific exons, or they may include only the gene-specific exons. Two alternatively spliced variants have been described for HOXC5. The transcript variant which includes the shared exon apparently doesn't encode a protein. The protein-coding transcript variant contains gene-specific exons only. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HOXC6	NM_004503.4	c.363G>T	p.Gln121His	missense_variant	Exon 1 of 2	ENST00000243108.5	NP_004494.1
HOXC6	NM_153693.5	c.117G>T	p.Gln39His	missense_variant	Exon 2 of 3		NP_710160.1
HOXC4	NM_014620.6	c.-124+11470G>T		intron_variant	Intron 1 of 3		NP_055435.2
HOXC5	NR_003084.3	n.528-5394G>T		intron_variant	Intron 1 of 1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HOXC6	ENST00000243108.5	c.363G>T	p.Gln121His	missense_variant	Exon 1 of 2	1	NM_004503.4	ENSP00000243108.4
ENSG00000273049	ENST00000513209.1	c.167-5394G>T		intron_variant	Intron 1 of 1	3		ENSP00000476742.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Dec 12, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.363G>T (p.Q121H) alteration is located in exon 1 (coding exon 1) of the HOXC6 gene. This alteration results from a G to T substitution at nucleotide position 363, causing the glutamine (Q) at amino acid position 121 to be replaced by a histidine (H). 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	0.31
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.030
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Benign	0.24	.;.;.;T
Eigen	Uncertain	0.24
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.94	D;D;D;D
M_CAP	Benign	0.083	D
MetaRNN	Uncertain	0.53	D;D;D;D
MetaSVM	Uncertain	0.30	D
MutationAssessor	Uncertain	2.3	.;.;.;M
PhyloP100		5.0
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-4.3	D;D;N;N
REVEL	Uncertain	0.41
Sift	Uncertain	0.016	D;D;T;D
Sift4G	Uncertain	0.030	D;D;T;D
Polyphen		0.029	.;.;.;B
Vest4		0.39, 0.20
MutPred		0.36		.;.;.;Loss of disorder (P = 0.0744);
MVP		0.83
MPC		1.6
ClinPred		0.99	D
GERP RS		5.5
PromoterAI		-0.068	Neutral
Varity_R		0.37
gMVP		0.59
Mutation Taster		=42/58	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

hg19: chr12-54422668;