chr20-38060491-A-C

Position:

• chr20-38060491-A-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_021215.4(RPRD1B):​c.655+971A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RPRD1B NM_021215.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.313

Genes affected

RPRD1B (HGNC:16209): (regulation of nuclear pre-mRNA domain containing 1B) Enables RNA polymerase II complex binding activity and identical protein binding activity. Involved in positive regulation of cell population proliferation; regulation of cell cycle process; and regulation of transcription by RNA polymerase II. Located in nucleoplasm. Part of RNA polymerase II, holoenzyme. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RPRD1B	NM_021215.4	c.655+971A>C		intron_variant		ENST00000373433.9
RPRD1B	XM_047440346.1	c.331+971A>C		intron_variant
RPRD1B	XM_047440347.1	c.256+971A>C		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RPRD1B	ENST00000373433.9	c.655+971A>C		intron_variant		1	NM_021215.4	P1
RPRD1B	ENST00000449186.2	c.301+971A>C		intron_variant		4
RPRD1B	ENST00000462548.6	c.*342+971A>C		intron_variant, NMD_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	2.5
DANN	Benign	0.66

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: rs6022716; hg19: chr20-36688893;