7-27095694-GC-AT

Variant names:

• chr7-27095694-GC-AT
• NM_005522.5:c.218_219delGCinsAT
• HOXA1 p.Arg73His

Variant summary

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

The NM_005522.5(HOXA1):​c.218_219delGCinsAT​(p.Arg73His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. The variant is present in control chromosomes in GnomAd MNV project. The variant allele was found at a frequency of 0.00000481 in 1 alleles, including 0 homozygotes. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Benign in ClinVar.

• Frequency: GnomAD MNV: 𝑓 0.0000048 Genomes: not found (cov: 28)
• Consequence: HOXA1 NM_005522.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.35
• Publications: 0 publications found

Genes affected

HOXA1 (HGNC:5099): (homeobox A1) 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. The encoded protein may be involved in the placement of hindbrain segments in the proper location along the anterior-posterior axis during development. Two transcript variants encoding two different isoforms have been found for this gene, with only one of the isoforms containing the homeodomain region. [provided by RefSeq, Jul 2008]

HOTAIRM1 (HGNC:37117): (HOXA transcript antisense RNA, myeloid-specific 1) This non-coding locus is located in the HOX gene cluster. Transcription of this locus is induced by retinoic acid, and transcripts likely function in regulation of myelopoiesis through transcriptional activation of several genes in the HOXA cluster, in addition to several beta-2 integrins. [provided by RefSeq, Jan 2013]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005522.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HOXA1	NM_005522.5	MANE Select	c.218_219delGCinsAT	p.Arg73His	missense	N/A	NP_005513.2	P49639-1
	HOXA1	NM_153620.3		c.218_219delGCinsAT	p.Arg73His	missense	N/A	NP_705873.3	P49639-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HOXA1	ENST00000643460.2	MANE Select	c.218_219delGCinsAT	p.Arg73His	missense	N/A	ENSP00000494260.2	P49639-1
	HOXA1	ENST00000355633.5	TSL:1	c.218_219delGCinsAT	p.Arg73His	missense	N/A	ENSP00000347851.5	E7ERT8
	HOTAIRM1	ENST00000495032.1	TSL:5	n.26+22_26+23delGCinsAT		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 28

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 28

GnomAD MNV AF: 0.00000481 AC: 1 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.3

Splicing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr7-27135313;