17-46023982-C-G

Variant names:

• chr17-46023982-C-G
• NM_001377265.1:c.2313C>G
• MAPT p.Arg771Arg

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001377265.1(MAPT):​c.2313C>G​(p.Arg771Arg) variant causes a synonymous 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. Synonymous variant affecting the same amino acid position (i.e. R771R) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MAPT NM_001377265.1 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -7.22
• Publications: 0 publications found

Genes affected

MAPT (HGNC:6893): (microtubule associated protein tau) This gene encodes the microtubule-associated protein tau (MAPT) whose transcript undergoes complex, regulated alternative splicing, giving rise to several mRNA species. MAPT transcripts are differentially expressed in the nervous system, depending on stage of neuronal maturation and neuron type. MAPT gene mutations have been associated with several neurodegenerative disorders such as Alzheimer's disease, Pick's disease, frontotemporal dementia, cortico-basal degeneration and progressive supranuclear palsy. [provided by RefSeq, Jul 2008]

MAPT Gene-Disease associations (from GenCC):

• Pick disease

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• semantic dementia

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• supranuclear palsy, progressive, 1

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• late-onset Parkinson disease

  Inheritance: Unknown, AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• progressive supranuclear palsy-parkinsonism syndrome

  Inheritance: AR Classification: MODERATE, LIMITED Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.71).
• BP7: Synonymous conserved (PhyloP=-7.22 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001377265.1. 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
	MAPT	NM_001377265.1	MANE Select	c.2313C>G	p.Arg771Arg	synonymous	Exon 13 of 13	NP_001364194.1	A0A7I2PJZ2
	MAPT	NM_001123066.4		c.2142C>G	p.Arg714Arg	synonymous	Exon 15 of 15	NP_001116538.2	P10636-9
	MAPT	NM_016835.5		c.2088C>G	p.Arg696Arg	synonymous	Exon 14 of 14	NP_058519.3	P10636-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAPT	ENST00000262410.10	TSL:1 MANE Select	c.2313C>G	p.Arg771Arg	synonymous	Exon 13 of 13	ENSP00000262410.6	A0A7I2PJZ2
	MAPT	ENST00000344290.10	TSL:1	c.2022C>G	p.Arg674Arg	synonymous	Exon 11 of 11	ENSP00000340820.6	A0A7I2PLE3
	MAPT	ENST00000351559.10	TSL:1	c.1137C>G	p.Arg379Arg	synonymous	Exon 12 of 12	ENSP00000303214.7	P10636-8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.71
CADD	Benign	0.060
DANN	Benign	0.74
PhyloP100		-7.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr17-44101348;