NM_001377265.1:c.830C>A

Variant names:

• chr17-45983409-C-A
• rs63750417
• NM_001377265.1:c.830C>A

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_Moderate BS1

The NM_001377265.1(MAPT):​c.830C>A​(p.Pro277Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000688 in 1,454,038 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. P277L) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000069 (0 hom.)
• Consequence: MAPT NM_001377265.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.432
• Publications: 52 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: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• 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: Labcorp Genetics (formerly Invitae), Genomics England PanelApp

ACMG classification

Our verdict: Likely_benign. The variant received -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.20751017).
• BS1: Variant frequency is greater than expected in population sas. GnomAdExome4 allele frequency = 0.00000688 (10/1454038) while in subpopulation SAS AF = 0.000117 (10/85760). AF 95% confidence interval is 0.0000628. There are 0 homozygotes in GnomAdExome4. There are 7 alleles in the male GnomAdExome4 subpopulation. Median coverage is 34. This position passed quality control check.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAPT	NM_001377265.1	MANE Select	c.830C>A	p.Pro277Gln	missense	Exon 5 of 13	NP_001364194.1
	MAPT	NM_001123066.4		c.605C>A	p.Pro202Gln	missense	Exon 6 of 15	NP_001116538.2
	MAPT	NM_016835.5		c.605C>A	p.Pro202Gln	missense	Exon 6 of 14	NP_058519.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAPT	ENST00000262410.10	TSL:1 MANE Select	c.830C>A	p.Pro277Gln	missense	Exon 5 of 13	ENSP00000262410.6
	MAPT	ENST00000344290.10	TSL:1	c.830C>A	p.Pro277Gln	missense	Exon 5 of 11	ENSP00000340820.6
	MAPT	ENST00000351559.10	TSL:1	c.374-3631C>A		intron	N/A	ENSP00000303214.7

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000209 AC: 5 AN: 239580 AF XY: 0.0000306

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000170

GnomAD4 exome AF: 0.00000688 AC: 10 AN: 1454038 Hom.: 0 Cov.: 34 AF XY: 0.00000969 AC XY: 7 AN XY: 722324

African (AFR) AF: 0.00 AC: 0 AN: 33300

American (AMR) AF: 0.00 AC: 0 AN: 44176

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25872

East Asian (EAS) AF: 0.00 AC: 0 AN: 39552

South Asian (SAS) AF: 0.000117 AC: 10 AN: 85760

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52030

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5726

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107690

Other (OTH) AF: 0.00 AC: 0 AN: 59932

GnomAD4 genome Cov.: 32

ExAC AF: 0.0000249 AC: 3

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.43	T
BayesDel_noAF	Benign	-0.62
CADD	Benign	17
DANN	Benign	0.97
DEOGEN2	Benign	0.29	T
Eigen	Benign	-0.48
Eigen_PC	Benign	-0.72
FATHMM_MKL	Benign	0.073	N
LIST_S2	Benign	0.69	T
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.21	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.0	L
PhyloP100		0.43
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-0.29	N
REVEL	Benign	0.048
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.028	D
Polyphen		1.0	D
Vest4		0.21
MutPred		0.51		Loss of glycosylation at P201 (P = 0.1774)
MVP		0.58
MPC		0.41
ClinPred		0.24	T
GERP RS		-0.93
Varity_R		0.043
gMVP		0.16

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: rs63750417; hg19: chr17-44060775;