18-35070275-A-G

Variant names:

• chr18-35070275-A-G
• rs864309719
• NM_014268.4:c.203A>G

Variant summary

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

The NM_014268.4(MAPRE2):​c.203A>G​(p.Asn68Ser) 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. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MAPRE2 NM_014268.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.24
• Publications: 4 publications found

Genes affected

MAPRE2 (HGNC:6891): (microtubule associated protein RP/EB family member 2) The protein encoded by this gene shares significant homology to the adenomatous polyposis coli (APC) protein-binding EB1 gene family. This protein is a microtubule-associated protein that is necessary for spindle symmetry during mitosis. It is thought to play a role in the tumorigenesis of colorectal cancers and the proliferative control of normal cells. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Jan 2012]

MAPRE2 Gene-Disease associations (from GenCC):

• skin creases, congenital symmetric circumferential, 2

  Inheritance: Unknown, AD, AR Classification: DEFINITIVE, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• multiple benign circumferential skin creases on limbs

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

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, 0.965
• PP5: Variant 18-35070275-A-G is Pathogenic according to our data. Variant chr18-35070275-A-G is described in ClinVar as Pathogenic. ClinVar VariationId is 218929.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014268.4. 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
	MAPRE2	NM_014268.4	MANE Select	c.203A>G	p.Asn68Ser	missense	Exon 2 of 7	NP_055083.1
	MAPRE2	NM_001143827.3		c.167A>G	p.Asn56Ser	missense	Exon 3 of 8	NP_001137299.1
	MAPRE2	NM_001143826.3		c.74A>G	p.Asn25Ser	missense	Exon 3 of 8	NP_001137298.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAPRE2	ENST00000300249.10	TSL:1 MANE Select	c.203A>G	p.Asn68Ser	missense	Exon 2 of 7	ENSP00000300249.4
	MAPRE2	ENST00000588910.5	TSL:1	c.203A>G	p.Asn68Ser	missense	Exon 2 of 5	ENSP00000468588.1
	MAPRE2	ENST00000942657.1		c.203A>G	p.Asn68Ser	missense	Exon 2 of 7	ENSP00000612716.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Skin creases, congenital symmetric circumferential, 2 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.86
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.18
CADD	Uncertain	25
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.85	D
Eigen	Pathogenic	0.97
Eigen_PC	Pathogenic	0.90
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.76	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.1	M
PhyloP100		9.2
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-4.8	D
REVEL	Pathogenic	0.95
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.036	D
Polyphen		0.99	D
Vest4		0.91
MutPred		0.83		Loss of stability (P = 0.3059)
MVP		0.93
MPC		2.7
ClinPred		1.0	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.84
gMVP		0.99
Mutation Taster		=2/98	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs864309719; hg19: chr18-32650239;