7-155800178-C-T

Variant names:

• chr7-155800178-C-T
• rs574899320
• ENST00000430104.5:c.369G>A

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_Strong BP6 BS1 BS2

The NM_001310462.2(SHH):​c.369G>A​(p.Pro123Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000382 in 471,242 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 (no stars).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000047 (0 hom.)
• Consequence: SHH NM_001310462.2 synonymous
• Clinical Significance: Likely benign no assertion criteria provided B:1
• Conservation: PhyloP100: -3.85

Genes affected

SHH (HGNC:10848): (sonic hedgehog signaling molecule) This gene encodes a protein that is instrumental in patterning the early embryo. It has been implicated as the key inductive signal in patterning of the ventral neural tube, the anterior-posterior limb axis, and the ventral somites. Of three human proteins showing sequence and functional similarity to the sonic hedgehog protein of Drosophila, this protein is the most similar. The protein is made as a precursor that is autocatalytically cleaved; the N-terminal portion is soluble and contains the signalling activity while the C-terminal portion is involved in precursor processing. More importantly, the C-terminal product covalently attaches a cholesterol moiety to the N-terminal product, restricting the N-terminal product to the cell surface and preventing it from freely diffusing throughout the developing embryo. Defects in this protein or in its signalling pathway are a cause of holoprosencephaly (HPE), a disorder in which the developing forebrain fails to correctly separate into right and left hemispheres. HPE is manifested by facial deformities. It is also thought that mutations in this gene or in its signalling pathway may be responsible for VACTERL syndrome, which is characterized by vertebral defects, anal atresia, tracheoesophageal fistula with esophageal atresia, radial and renal dysplasia, cardiac anomalies, and limb abnormalities. Additionally, mutations in a long range enhancer located approximately 1 megabase upstream of this gene disrupt limb patterning and can result in preaxial polydactyly. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 7-155800178-C-T is Benign according to our data. Variant chr7-155800178-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 3053417.Status of the report is no_assertion_criteria_provided, 0 stars.
• BS1: Variant frequency is greater than expected in population eas. gnomad4_exome allele frequency = 0.000047 (15/318912) while in subpopulation EAS AF= 0.00076 (7/9214). AF 95% confidence interval is 0.000356. There are 0 homozygotes in gnomad4_exome. There are 8 alleles in male gnomad4_exome subpopulation. Median coverage is 0. This position pass quality control queck.
• BS2: High AC in GnomAdExome4 at 15 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SHH	NM_000193.4	c.*2722G>A		3_prime_UTR_variant	Exon 3 of 3	ENST00000297261.7	NP_000184.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SHH	ENST00000297261	c.*2722G>A		3_prime_UTR_variant	Exon 3 of 3	1	NM_000193.4	ENSP00000297261.2

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152212 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000385

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000800 AC: 12 AN: 149936 Hom.: 0 AF XY: 0.0000372 AC XY: 3 AN XY: 80618

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000814

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000649

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000592

Gnomad NFE exome AF: 0.0000360

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000470 AC: 15 AN: 318912 Hom.: 0 Cov.: 0 AF XY: 0.0000444 AC XY: 8 AN XY: 180148

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000110

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000760

Gnomad4 SAS exome AF: 0.0000167

Gnomad4 FIN exome AF: 0.0000370

Gnomad4 NFE exome AF: 0.00000629

Gnomad4 OTH exome AF: 0.0000696

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152330 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74486

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000653

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000386

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000282 Hom.: 0

Bravo AF: 0.0000340

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: no assertion criteria provided

Submissions by phenotype

SHH-related disorder Benign:1

Aug 29, 2019

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.083
DANN	Benign	0.52

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

LitVar

Other links and lift over

dbSNP: rs574899320; hg19: chr7-155592872; COSMIC: COSV99793314;