chr17-63918138-T-A

Variant names:

• chr17-63918138-T-A
• rs863223309
• NM_000515.5:c.172-2A>T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_000515.5(GH1):​c.172-2A>T variant causes a splice acceptor, intron change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: GH1 NM_000515.5 splice_acceptor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 4.20
• Publications: 1 publications found

Genes affected

GH1 (HGNC:4261): (growth hormone 1) The protein encoded by this gene is a member of the somatotropin/prolactin family of hormones which play an important role in growth control. The gene, along with four other related genes, is located at the growth hormone locus on chromosome 17 where they are interspersed in the same transcriptional orientation; an arrangement which is thought to have evolved by a series of gene duplications. The five genes share a remarkably high degree of sequence identity. Alternative splicing generates additional isoforms of each of the five growth hormones, leading to further diversity and potential for specialization. This particular family member is expressed in the pituitary but not in placental tissue as is the case for the other four genes in the growth hormone locus. Mutations in or deletions of the gene lead to growth hormone deficiency and short stature. [provided by RefSeq, Jul 2008]

GH1 Gene-Disease associations (from GenCC):

• isolated growth hormone deficiency type IA

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
• isolated growth hormone deficiency type II

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
• isolated growth hormone deficiency type IB

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• short stature due to growth hormone qualitative anomaly

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000285947 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.18348624 fraction of the gene. Cryptic splice site detected, with MaxEntScore 5.4, offset of 45, new splice context is: agaagtattcattcctgcAGaac. Cryptic site results in inframe change. If cryptic site found is not functional and variant results in exon loss, it results in inframe change.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 17-63918138-T-A is Pathogenic according to our data. Variant chr17-63918138-T-A is described in ClinVar as Pathogenic. ClinVar VariationId is 15979.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GH1	NM_000515.5	c.172-2A>T		splice_acceptor_variant, intron_variant	Intron 2 of 4	ENST00000323322.10	NP_000506.2
GH1	NM_022559.4	c.172-47A>T		intron_variant	Intron 2 of 4		NP_072053.1
GH1	NM_022560.4	c.171+208A>T		intron_variant	Intron 2 of 3		NP_072054.1
LOC112268204	XR_002958148.2	n.*212T>A		downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GH1	ENST00000323322.10	c.172-2A>T		splice_acceptor_variant, intron_variant	Intron 2 of 4	1	NM_000515.5	ENSP00000312673.5
ENSG00000285947	ENST00000647774.1	c.448-2A>T		splice_acceptor_variant, intron_variant	Intron 5 of 7			ENSP00000497443.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Autosomal dominant isolated somatotropin deficiency Pathogenic:1

Feb 01, 2003

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.55	D
BayesDel_noAF	Benign	-0.10
CADD	Pathogenic	26
DANN	Benign	0.97
Eigen	Pathogenic	0.72
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.78	D
PhyloP100		4.2
GERP RS		2.9
Mutation Taster		=14/86	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.94
SpliceAI score (max)		0.83		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.31		Position offset: 29
DS_AL_spliceai		0.83		Position offset: -2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs863223309; hg19: chr17-61995498;