chr7-27199919-G-C

Variant names:

• chr7-27199919-G-C
• rs1362954246
• NM_000522.5:c.159C>G

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_000522.5(HOXA13):​c.159C>G​(p.Ala53Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000692 in 144,600 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0000069 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: HOXA13 NM_000522.5 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.851
• Publications: 0 publications found

Genes affected

HOXA13 (HGNC:5102): (homeobox A13) 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. Expansion of a polyalanine tract in the encoded protein can cause hand-foot-uterus syndrome, also known as hand-foot-genital syndrome. [provided by RefSeq, Jul 2008]

HOTTIP (HGNC:37461): (HOXA distal transcript antisense RNA) This gene produces a long RNA in antisense to the HOXA gene cluster. This transcript may regulate expression of HOXA genes in cis. This gene is upregulated in tumors and is implicated in the promotion of cell proliferation. [provided by RefSeq, Dec 2017]

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.58).
• BP6: Variant 7-27199919-G-C is Benign according to our data. Variant chr7-27199919-G-C is described in ClinVar as Likely_benign. ClinVar VariationId is 435443.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.851 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000522.5. 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
	HOXA13	NM_000522.5	MANE Select	c.159C>G	p.Ala53Ala	synonymous	Exon 1 of 2	NP_000513.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HOXA13	ENST00000649031.1	MANE Select	c.159C>G	p.Ala53Ala	synonymous	Exon 1 of 2	ENSP00000497112.1
	HOTTIP	ENST00000421733.1	TSL:5	n.168-704G>C		intron	N/A
	HOTTIP	ENST00000605136.7	TSL:2	n.92+589G>C		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.00000692 AC: 1 AN: 144600 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000153

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1056630 Hom.: 0 Cov.: 20 AF XY: 0.00 AC XY: 0 AN XY: 508646

African (AFR) AF: 0.00 AC: 0 AN: 20982

American (AMR) AF: 0.00 AC: 0 AN: 14588

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 15016

East Asian (EAS) AF: 0.00 AC: 0 AN: 18870

South Asian (SAS) AF: 0.00 AC: 0 AN: 35738

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 25406

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2750

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 884056

Other (OTH) AF: 0.00 AC: 0 AN: 39224

GnomAD4 genome AF: 0.00000692 AC: 1 AN: 144600 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 70402

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 39754

American (AMR) AF: 0.00 AC: 0 AN: 14694

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3398

East Asian (EAS) AF: 0.00 AC: 0 AN: 4858

South Asian (SAS) AF: 0.00 AC: 0 AN: 4674

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 8524

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 298

European-Non Finnish (NFE) AF: 0.0000153 AC: 1 AN: 65536

Other (OTH) AF: 0.00 AC: 0 AN: 1996

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.58
CADD	Benign	9.6
DANN	Benign	0.75
PhyloP100		-0.85
PromoterAI		-0.023	Neutral
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs1362954246; hg19: chr7-27239538;