ENST00000510363.1:n.66C>A

Variant names:

• chr5-178153819-G-T
• rs1200196278
• NM_017838.4:c.-2C>A

Variant summary

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

The ENST00000510363.1(NHP2):​n.66C>A variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,200 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: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: NHP2 ENST00000510363.1 non_coding_transcript_exon
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: -0.706
• Publications: 0 publications found

Genes affected

NHP2 (HGNC:14377): (NHP2 ribonucleoprotein) This gene is a member of the H/ACA snoRNPs (small nucleolar ribonucleoproteins) gene family. snoRNPs are involved in various aspects of rRNA processing and modification and have been classified into two families: C/D and H/ACA. The H/ACA snoRNPs also include the DKC1, NOLA1 and NOLA3 proteins. These four H/ACA snoRNP proteins localize to the dense fibrillar components of nucleoli and to coiled (Cajal) bodies in the nucleus. Both 18S rRNA production and rRNA pseudouridylation are impaired if any one of the four proteins is depleted. The four H/ACA snoRNP proteins are also components of the telomerase complex. This gene encodes a protein related to Saccharomyces cerevisiae Nhp2p. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2008]

NHP2 Gene-Disease associations (from GenCC):

• dyskeratosis congenita, autosomal recessive 2

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• dyskeratosis congenita

  Inheritance: AD, AR Classification: SUPPORTIVE, LIMITED Submitted by: Orphanet, ClinGen

ENSG00000289726 (HGNC:):

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=-0.76).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000510363.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NHP2	NM_017838.4	MANE Select	c.-2C>A		5_prime_UTR	Exon 1 of 4	NP_060308.1
	NHP2	NM_001396110.1		c.-2C>A		5_prime_UTR	Exon 1 of 5	NP_001383039.1
	NHP2	NM_001034833.2		c.-2C>A		5_prime_UTR	Exon 1 of 3	NP_001030005.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NHP2	ENST00000274606.8	TSL:1 MANE Select	c.-2C>A		5_prime_UTR	Exon 1 of 4	ENSP00000274606.4
	NHP2	ENST00000510363.1	TSL:1	n.66C>A		non_coding_transcript_exon	Exon 1 of 2
	NHP2	ENST00000940843.1		c.-2C>A		5_prime_UTR	Exon 1 of 4	ENSP00000610902.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152200 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00 AC: 0 AN: 227482 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 6.89e-7 AC: 1 AN: 1452208 Hom.: 0 Cov.: 31 AF XY: 0.00000139 AC XY: 1 AN XY: 721958

African (AFR) AF: 0.00 AC: 0 AN: 33270

American (AMR) AF: 0.00 AC: 0 AN: 43016

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25884

East Asian (EAS) AF: 0.00 AC: 0 AN: 39172

South Asian (SAS) AF: 0.00 AC: 0 AN: 85206

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52192

Middle Eastern (MID) AF: 0.000174 AC: 1 AN: 5756

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107766

Other (OTH) AF: 0.00 AC: 0 AN: 59946

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152200 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74364

African (AFR) AF: 0.0000241 AC: 1 AN: 41444

American (AMR) AF: 0.00 AC: 0 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68040

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.76
CADD	Benign	2.0
DANN	Benign	0.85
PhyloP100		-0.71
PromoterAI		-0.085	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.1

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: rs1200196278; hg19: chr5-177580820;