chr5-42423891-C-T

Variant names:

• chr5-42423891-C-T
• rs1742723526
• NM_000163.5:c.-76C>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000163.5(GHR):​c.-76C>T variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000229 in 4,362 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 Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.00023 (0 hom.)
• Consequence: GHR NM_000163.5 5_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.14
• Publications: 0 publications found

Genes affected

GHR (HGNC:4263): (growth hormone receptor) This gene encodes a member of the type I cytokine receptor family, which is a transmembrane receptor for growth hormone. Binding of growth hormone to the receptor leads to receptor dimerization and the activation of an intra- and intercellular signal transduction pathway leading to growth. Mutations in this gene have been associated with Laron syndrome, also known as the growth hormone insensitivity syndrome (GHIS), a disorder characterized by short stature. In humans and rabbits, but not rodents, growth hormone binding protein (GHBP) is generated by proteolytic cleavage of the extracellular ligand-binding domain from the mature growth hormone receptor protein. Multiple alternatively spliced transcript variants have been found for this gene.[provided by RefSeq, Jun 2011]

GHR Gene-Disease associations (from GenCC):

• Laron syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P
• short stature due to partial GHR deficiency

  Inheritance: Unknown, AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.6).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GHR	NM_000163.5	c.-76C>T		5_prime_UTR_variant	Exon 1 of 10	ENST00000230882.9	NP_000154.1
GHR	NM_001242460.2	c.-76C>T		5_prime_UTR_variant	Exon 1 of 9		NP_001229389.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GHR	ENST00000230882.9	c.-76C>T		5_prime_UTR_variant	Exon 1 of 10	1	NM_000163.5	ENSP00000230882.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.000229 AC: 1 AN: 4362 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 3102

African (AFR) AF: 0.00 AC: 0 AN: 40

American (AMR) AF: 0.00 AC: 0 AN: 32

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26

East Asian (EAS) AF: 0.00 AC: 0 AN: 68

South Asian (SAS) AF: 0.00 AC: 0 AN: 886

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 16

European-Non Finnish (NFE) AF: 0.000363 AC: 1 AN: 2752

Other (OTH) AF: 0.00 AC: 0 AN: 134

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Laron-type isolated somatotropin defect Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.60
CADD	Benign	15
DANN	Benign	0.95
PhyloP100		3.1
PromoterAI		-0.14	Neutral

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: rs1742723526; hg19: chr5-42423993;