chr17-63872169-C-G

Variant names:

• chr17-63872169-C-G
• rs377538456
• NM_020991.4:c.611G>C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_020991.4(CSH2):​c.611G>C​(p.Arg204Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 29)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CSH2 NM_020991.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.93

Genes affected

CSH2 (HGNC:2441): (chorionic somatomammotropin hormone 2) The protein encoded by this gene is a member of the somatotropin/prolactin family of hormones and plays an important role in growth control. The gene is located at the growth hormone locus on chromosome 17 along with four other related genes in the same transcriptional orientation; an arrangement which is thought to have evolved by a series of gene duplications. Although the five genes share a remarkably high degree of sequence identity, they are expressed selectively in different tissues. Alternative splicing generates additional isoforms of each of the five growth hormones. This particular family member is expressed mainly in the placenta and utilizes multiple transcription initiation sites. Expression of the identical mature proteins for chorionic somatomammotropin hormones 1 and 2 is upregulated during development, while the ratio of 1 to 2 increases by term. Structural and expression differences provide avenues for developmental regulation and tissue specificity. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.881

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CSH2	NM_020991.4	c.611G>C	p.Arg204Pro	missense_variant	Exon 5 of 5	ENST00000392886.7	NP_066271.1
CSH2	NM_022645.2	c.326G>C	p.Arg109Pro	missense_variant	Exon 3 of 3		NP_072171.1
CSH2	NM_022644.3	c.*360G>C		3_prime_UTR_variant	Exon 4 of 4		NP_072170.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CSH2	ENST00000392886.7	c.611G>C	p.Arg204Pro	missense_variant	Exon 5 of 5	1	NM_020991.4	ENSP00000376623.2

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251478 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135916

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 6.84e-7 AC: 1 AN: 1461826 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727218

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 29

Alfa AF: 0.0000225 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.84
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Pathogenic	0.22
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.87	.;D;D;.
Eigen	Benign	0.057
Eigen_PC	Benign	-0.058
FATHMM_MKL	Benign	0.74	D
LIST_S2	Uncertain	0.95	D;D;D;.
M_CAP	Benign	0.068	D
MetaRNN	Pathogenic	0.88	D;D;D;D
MetaSVM	Uncertain	-0.0066	T
MutationAssessor	Uncertain	2.9	.;M;.;.
PrimateAI	Uncertain	0.49	T
PROVEAN	Pathogenic	-4.9	D;D;D;.
REVEL	Uncertain	0.58
Sift	Uncertain	0.0010	D;D;D;.
Sift4G	Uncertain	0.0030	D;D;D;D
Vest4		0.65
MutPred		0.67		.;Loss of MoRF binding (P = 0.072);.;.;
MVP		0.79
ClinPred		1.0	D
GERP RS		3.0
Varity_R		0.78
gMVP		0.80

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: rs377538456; hg19: chr17-61949529;