7-155802688-A-G

Variant names:

• chr7-155802688-A-G
• rs111658284
• NM_000193.4:c.*212T>C

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_000193.4(SHH):​c.*212T>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00193 in 396,968 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0041 (2 hom., cov: 33)
  • Exomes 𝑓: 0.00056 (1 hom.)
• Consequence: SHH NM_000193.4 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.322
• Publications: 0 publications found

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]

SHH Gene-Disease associations (from GenCC):

• holoprosencephaly 3

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• microphthalmia, isolated, with coloboma 5

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, PanelApp Australia
• polydactyly of a triphalangeal thumb

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
• solitary median maxillary central incisor syndrome

  Inheritance: AD Classification: DEFINITIVE, MODERATE Submitted by: G2P, Ambry Genetics
• skeletal system disorder

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• autosomal dominant preaxial polydactyly-upperback hypertrichosis syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hypoplastic tibiae-postaxial polydactyly syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• microphthalmia, isolated, with coloboma

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• syndactyly type 4

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• triphalangeal thumb-polysyndactyly syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• holoprosencephaly

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.72).
• BP6: Variant 7-155802688-A-G is Benign according to our data. Variant chr7-155802688-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 1201549.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00413 (629/152304) while in subpopulation AFR AF = 0.0144 (597/41570). AF 95% confidence interval is 0.0134. There are 2 homozygotes in GnomAd4. There are 284 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SHH	NM_000193.4	c.*212T>C		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	ENST00000297261.7	c.*212T>C		3_prime_UTR_variant	Exon 3 of 3	1	NM_000193.4	ENSP00000297261.2
SHH	ENST00000430104.5	c.302-2443T>C		intron_variant	Intron 3 of 3	1		ENSP00000396621.1
SHH	ENST00000435425.1	n.302-2091T>C		intron_variant	Intron 3 of 4	1		ENSP00000413871.1
SHH	ENST00000441114.5	n.302-2021T>C		intron_variant	Intron 3 of 4	1		ENSP00000410546.1

Frequencies

GnomAD3 genomes AF: 0.00413 AC: 629 AN: 152186 Hom.: 2 Cov.: 33

Gnomad AFR AF: 0.0144

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00383

GnomAD4 exome AF: 0.000564 AC: 138 AN: 244664 Hom.: 1 Cov.: 4 AF XY: 0.000419 AC XY: 52 AN XY: 124214

African (AFR) AF: 0.0146 AC: 103 AN: 7070

American (AMR) AF: 0.000692 AC: 5 AN: 7228

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 9138

East Asian (EAS) AF: 0.00 AC: 0 AN: 22534

South Asian (SAS) AF: 0.00 AC: 0 AN: 2486

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 20274

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 1302

European-Non Finnish (NFE) AF: 0.0000442 AC: 7 AN: 158472

Other (OTH) AF: 0.00142 AC: 23 AN: 16160

GnomAD4 genome AF: 0.00413 AC: 629 AN: 152304 Hom.: 2 Cov.: 33 AF XY: 0.00381 AC XY: 284 AN XY: 74468

African (AFR) AF: 0.0144 AC: 597 AN: 41570

American (AMR) AF: 0.00131 AC: 20 AN: 15300

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10610

Middle Eastern (MID) AF: 0.00340 AC: 1 AN: 294

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68026

Other (OTH) AF: 0.00379 AC: 8 AN: 2110

Alfa AF: 0.00361 Hom.: 0

Bravo AF: 0.00500

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Aug 15, 2020

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.72
CADD	Benign	1.4
DANN	Benign	0.85
PhyloP100		0.32
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: rs111658284; hg19: chr7-155595382;