Genetic Variant MFAP4:p.Arg254Gln (chr17-19384469-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_002404.3(MFAP4):c.761G>A(p.Arg254Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000356 in 1,572,916 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

MFAP4
NM_002404.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.693

Variant links:

Genes affected

MFAP4 (HGNC:7035): (microfibril associated protein 4) This gene encodes a protein with similarity to a bovine microfibril-associated protein. The protein has binding specificities for both collagen and carbohydrate. It is thought to be an extracellular matrix protein which is involved in cell adhesion or intercellular interactions. The gene is located within the Smith-Magenis syndrome region. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2010]

MFAP4 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11011055).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MFAP4	NM_002404.3 link	c.761G>A	p.Arg254Gln	missense_variant	Exon 6 of 6	ENST00000299610.5	NP_002395.1	P55083-1
MFAP4	NM_001198695.2 link	c.833G>A	p.Arg278Gln	missense_variant	Exon 6 of 6		NP_001185624.1	P55083-2A0A024QZ34

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MFAP4	ENST00000299610.5 link	c.761G>A	p.Arg254Gln	missense_variant	Exon 6 of 6	1	NM_002404.3	ENSP00000299610.5		P55083-1

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152054

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000578

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000428

AC:

AN:

187056

Hom.:

AF XY:

0.0000299

AC XY:

AN XY:

100246

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000225

Gnomad SAS exome

AF:

0.0000779

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000255

Gnomad OTH exome

AF:

0.000200

GnomAD4 exome

AF:

0.0000345

AC:

AN:

1420744

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

703276

show subpopulations

Gnomad4 AFR exome

AF:

0.0000309

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000324

Gnomad4 SAS exome

AF:

0.0000244

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000266

Gnomad4 OTH exome

AF:

0.0000850

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74388

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000580

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000508

Hom.:

Bravo

AF:

0.0000453

ExAC

AF:

0.0000834

AC:

Asia WGS

AF:

0.00144

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 17, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.833G>A (p.R278Q) alteration is located in exon 6 (coding exon 6) of the MFAP4 gene. This alteration results from a G to A substitution at nucleotide position 833, causing the arginine (R) at amino acid position 278 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.36

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.47

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.063

T;.;T

Eigen

Benign

0.052

Eigen_PC

Benign

0.016

FATHMM_MKL

Uncertain

0.85

LIST_S2

Benign

0.83

T;T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.11

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

2.0

.;.;M

PrimateAI

Uncertain

0.54

PROVEAN

Benign

-0.18

.;N;N

REVEL

Benign

0.080

Sift

Benign

0.18

.;T;T

Sift4G

Benign

0.19

T;T;T

Polyphen

0.92

.;.;P

Vest4

0.36

MVP

0.29

MPC

0.86

ClinPred

0.11

GERP RS

3.3

Varity_R

0.10

gMVP

0.95

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over