10-30313707-T-G

Variant names:

• chr10-30313707-T-G
• rs1000445497
• NM_018109.4:c.1651A>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_018109.4(MTPAP):​c.1651A>C​(p.Ile551Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I551V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MTPAP NM_018109.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.79
• Publications: 0 publications found

Genes affected

MTPAP (HGNC:25532): (mitochondrial poly(A) polymerase) The protein encoded by this gene is a member of the DNA polymerase type-B-like family. This enzyme synthesizes the 3' poly(A) tail of mitochondrial transcripts and plays a role in replication-dependent histone mRNA degradation.[provided by RefSeq, Jan 2011]

MTPAP Gene-Disease associations (from GenCC):

• mitochondrial disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• spastic ataxia 4

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09663534).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MTPAP	NM_018109.4	c.1651A>C	p.Ile551Leu	missense_variant	Exon 9 of 9	ENST00000263063.9	NP_060579.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MTPAP	ENST00000263063.9	c.1651A>C	p.Ile551Leu	missense_variant	Exon 9 of 9	1	NM_018109.4	ENSP00000263063.3
MTPAP	ENST00000488290.5	n.3406A>C		non_coding_transcript_exon_variant	Exon 17 of 17	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.077
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	17
DANN	Benign	0.76
DEOGEN2	Benign	0.014	T
Eigen	Benign	-0.66
Eigen_PC	Benign	-0.55
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.19	T
M_CAP	Benign	0.0049	T
MetaRNN	Benign	0.097	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	N
PhyloP100		3.8
PrimateAI	Benign	0.26	T
PROVEAN	Benign	0.12	N
REVEL	Benign	0.076
Sift	Uncertain	0.027	D
Sift4G	Benign	0.29	T
Polyphen		0.0030	B
Vest4		0.093
MutPred		0.21		Gain of helix (P = 0.062);
MVP		0.28
MPC		0.35
ClinPred		0.12	T
GERP RS		3.5
Varity_R		0.062
gMVP		0.30
Mutation Taster		=93/7	polymorphism

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: rs1000445497; hg19: chr10-30602636;