NM_000938.3:c.2232G>A

Variant names:

• chr4-57017637-G-A
• NM_000938.3:c.2232G>A

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP2 PP3

The NM_000938.3(POLR2B):​c.2232G>A​(p.Met744Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: POLR2B NM_000938.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0
• Publications: 0 publications found

Genes affected

POLR2B (HGNC:9188): (RNA polymerase II subunit B) This gene encodes the second largest subunit of RNA polymerase II (Pol II), a DNA-dependent RNA polymerase that catalyzes the transcription of DNA into precursors of mRNA, snRNA and microRNA. This subunit and the largest subunit form opposite sides of the center cleft of Pol II. Deletion of the flap loop region of this subunit results in a decrease in the rate of transcriptional elongation. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014]

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 1 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 6.6178 (above the threshold of 3.09). Trascript score misZ: 6.4623 (above the threshold of 3.09).
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.828

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000938.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POLR2B	NM_000938.3	MANE Select	c.2232G>A	p.Met744Ile	missense	Exon 16 of 25	NP_000929.1	P30876
	POLR2B	NM_001303269.2		c.2211G>A	p.Met737Ile	missense	Exon 17 of 26	NP_001290198.1	C9J2Y9
	POLR2B	NM_001303268.2		c.2007G>A	p.Met669Ile	missense	Exon 15 of 24	NP_001290197.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POLR2B	ENST00000314595.6	TSL:1 MANE Select	c.2232G>A	p.Met744Ile	missense	Exon 16 of 25	ENSP00000312735.5	P30876
	POLR2B	ENST00000381227.5	TSL:5	c.2232G>A	p.Met744Ile	missense	Exon 17 of 26	ENSP00000370625.1	P30876
	POLR2B	ENST00000441246.6	TSL:2	c.2211G>A	p.Met737Ile	missense	Exon 17 of 26	ENSP00000391452.2	C9J2Y9

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.25
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.52	D
Eigen	Uncertain	0.57
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Benign	0.079	D
MetaRNN	Pathogenic	0.83	D
MetaSVM	Benign	-0.42	T
MutationAssessor	Benign	1.5	L
PhyloP100		10
PrimateAI	Pathogenic	0.90	D
PROVEAN	Uncertain	-3.5	D
REVEL	Pathogenic	0.69
Sift	Uncertain	0.011	D
Sift4G	Benign	0.22	T
Polyphen		0.79	P
Vest4		0.73
MutPred		0.74		Loss of sheet (P = 0.1158)
MVP		0.93
MPC		2.3
ClinPred		0.97	D
GERP RS		5.2
Varity_R		0.72
gMVP		0.95
Mutation Taster		=27/73	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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

hg19: chr4-57883803; COSMIC: COSV58898670; COSMIC: COSV58898670;