rs199588904
Variant summary
Our verdict is Uncertain significance. The variant received 1 ACMG points: 1P and 0B. PP3
The NM_198407.2(GHSR):c.709A>T(p.Arg237Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000191 in 1,614,088 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R237K) has been classified as Uncertain significance.
Frequency
Consequence
NM_198407.2 missense
Scores
Clinical Significance
Conservation
Publications
- short stature due to GHSR deficiencyInheritance: AD, SD, AR Classification: MODERATE, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
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ACMG classification
Our verdict: Uncertain_significance. The variant received 1 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000105 AC: 16AN: 152078Hom.: 0 Cov.: 31 show subpopulations
GnomAD2 exomes AF: 0.000199 AC: 50AN: 250676 AF XY: 0.000236 show subpopulations
GnomAD4 exome AF: 0.000201 AC: 294AN: 1461892Hom.: 0 Cov.: 31 AF XY: 0.000215 AC XY: 156AN XY: 727246 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000986 AC: 15AN: 152196Hom.: 0 Cov.: 31 AF XY: 0.0000537 AC XY: 4AN XY: 74420 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not provided Uncertain:5
This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 237 of the GHSR protein (p.Arg237Trp). This variant is present in population databases (rs199588904, gnomAD 0.05%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with clinical features of growth hormone deficiency (PMID: 19789204). ClinVar contains an entry for this variant (Variation ID: 7634). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on GHSR protein function. Experimental studies have shown that this missense change affects GHSR function (PMID: 19789204). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Observed with a variant on the opposite allele (in trans) in a patient with partial growth hormone deficiency and unexplained episodes of abdominal pain, vomiting, ketosis, and hypoglycemia. Unaffected parents with normal stature were heterozygous carriers (PMID: 19789204); Reported as a single heterozygous variant in a proband with short stature; however, detailed clinical information was not provided (PMID: 39785833); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; In vitro functional studies show that the R237W mutant may have a modest impact on protein function; however, some measures were not statistically significant (PMID: 19789204, 39785833); This variant is associated with the following publications: (PMID: 34426522, 39785833, 19789204) -
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Short stature due to growth hormone secretagogue receptor deficiency Pathogenic:1Uncertain:2
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PM2, PP3, BP1 -
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Inborn genetic diseases Uncertain:1
The alteration results in an amino acid change:_x000D_ _x000D_ The c.709A>T (p.R237W) alteration is located in coding exon 1 of the GHSR gene. This alteration results from a A to T substitution at nucleotide position 709, causing the arginine (R) at amino acid position 237 to be replaced by a tryptophan (W). The alteration is rare in population databases: _x000D_ _x000D_ Based on data from the Genome Aggregation Database (gnomAD), the c.709A>T alteration was observed in 0.0195% (55/282,042) of total alleles studied. No homozygotes were reported in gnomAD. The alteration has been observed in affected individuals:_x000D_ _x000D_ A 6 year old boy with partial isolated growth hormone deficiency (IGHD) was reported to have compound heterozygous c.709A>T (p.R237W) and c.6G>A (p.W2*) in GHSR (Pantel, 2009). The patient initially had normal birth height and weight. Growth delay (−3.0 SD) was associated with recurrent episodes of abdominal pain, vomiting, ketosis, hypoglycemia, and a low body mass index. Endocrine investigations revealed markedly low levels of IGF-I. He displayed a low growth hormone (GH) response to two provocative tests with GH peaks less than 10 ng/ml and no other pituitary hormone deficiency, consistent with the diagnosis of partial IGHD. The altered amino acid is conserved throughout evolution:_x000D_ _x000D_ The p.R237 amino acid is conserved in available vertebrate species. The alteration is predicted inconclusive by in silico modeling:_x000D_ _x000D_ The in silico prediction for the p.R237W alteration is inconclusive. Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -
Short stature Uncertain:1
ACMG criteria used: PS3_Supporting, PM2 -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at