rs794729674

Variant names:

• chr2-86070107-C-G
• rs794729674
• NM_015425.6:c.1777G>C

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_015425.6(POLR1A):​c.1777G>C​(p.Glu593Gln) 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 Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: POLR1A NM_015425.6 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.54
• Publications: 4 publications found

Genes affected

POLR1A (HGNC:17264): (RNA polymerase I subunit A) The protein encoded by this gene is the largest subunit of the RNA polymerase I complex. The encoded protein represents the catalytic subunit of the complex, which transcribes DNA into ribosomal RNA precursors. Defects in this gene are a cause of the Cincinnati type of acrofacial dysostosis. [provided by RefSeq, May 2016]

POLR1A Gene-Disease associations (from GenCC):

• acrofacial dysostosis Cincinnati type

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• choanal atresia-hearing loss-cardiac defects-craniofacial dysmorphism syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• leukodystrophy, hypomyelinating, 27

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.964
• PP5: Variant 2-86070107-C-G is Pathogenic according to our data. Variant chr2-86070107-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 203463.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015425.6. 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
	POLR1A	NM_015425.6	MANE Select	c.1777G>C	p.Glu593Gln	missense	Exon 13 of 34	NP_056240.2	O95602

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POLR1A	ENST00000263857.11	TSL:1 MANE Select	c.1777G>C	p.Glu593Gln	missense	Exon 13 of 34	ENSP00000263857.6	O95602
	POLR1A	ENST00000409681.1	TSL:5	c.1777G>C	p.Glu593Gln	missense	Exon 13 of 34	ENSP00000386300.1	B9ZVN9
	POLR1A	ENST00000931492.1		c.1777G>C	p.Glu593Gln	missense	Exon 13 of 32	ENSP00000601551.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Acrofacial dysostosis Cincinnati type (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.27
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.69	D
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.72
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Uncertain	-0.090	T
MutationAssessor	Benign	1.3	L
PhyloP100		7.5
PrimateAI	Pathogenic	0.88	D
PROVEAN	Uncertain	-2.9	D
REVEL	Pathogenic	0.91
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.88
MutPred		0.89		Loss of sheet (P = 0.0817)
MVP		0.78
MPC		1.3
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.88
gMVP		0.97
Mutation Taster		=16/84	disease causing (ClinVar)

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: rs794729674; hg19: chr2-86297230;