chr12-54000243-G-A

Position:

• chr12-54000243-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_006897.3(HOXC9):​c.55G>A​(p.Asp19Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,820 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000055 (1 hom.)
• Consequence: HOXC9 NM_006897.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.85

Genes affected

HOXC9 (HGNC:5130): (homeobox C9) 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 is one of several homeobox HOXC genes located in a cluster on chromosome 12. [provided by RefSeq, Jul 2008]

ENSG00000273049 (HGNC:):

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]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• BS2: High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HOXC9	NM_006897.3	c.55G>A	p.Asp19Asn	missense_variant	1/2	ENST00000303450.5	NP_008828.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HOXC9	ENST00000303450.5	c.55G>A	p.Asp19Asn	missense_variant	1/2	1	NM_006897.3	ENSP00000302836.4
ENSG00000273049	ENST00000513209.1	c.166+14233G>A		intron_variant		3		ENSP00000476742.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461820 Hom.: 1 Cov.: 31 AF XY: 0.00000825 AC XY: 6 AN XY: 727210

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: 0.0000187

Gnomad4 NFE exome AF: 0.00000540

Gnomad4 OTH exome AF: 0.0000166

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

Jul 12, 2022

The c.55G>A (p.D19N) alteration is located in exon 1 (coding exon 1) of the HOXC9 gene. This alteration results from a G to A substitution at nucleotide position 55, causing the aspartic acid (D) at amino acid position 19 to be replaced by an asparagine (N). 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	Uncertain	0.36
BayesDel_addAF	Benign	0.0037	T
BayesDel_noAF	Benign	-0.23
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Benign	0.30	T;T
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.98	.;D
M_CAP	Uncertain	0.23	D
MetaRNN	Uncertain	0.47	T;T
MetaSVM	Uncertain	0.68	D
MutationAssessor	Benign	1.5	L;L
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	-2.2	N;N
REVEL	Uncertain	0.52
Sift	Uncertain	0.0010	D;D
Sift4G	Pathogenic	0.0010	D;D
Polyphen		0.83	P;P
Vest4		0.22
MutPred		0.51		Gain of catalytic residue at D19 (P = 0.002);Gain of catalytic residue at D19 (P = 0.002);
MVP		0.97
MPC		0.88
ClinPred		0.96	D
GERP RS		3.6
Varity_R		0.36

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: chr12-54394027;