1-16977172-C-T

Position:

• chr1-16977172-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_002403.4(MFAP2):​c.64G>A​(p.Asp22Asn) variant causes a missense 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: MFAP2 NM_002403.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.90

Genes affected

MFAP2 (HGNC:7033): (microfibril associated protein 2) Microfibrillar-associated protein 2 is a major antigen of elastin-associated microfibrils and a candidate for involvement in the etiology of inherited connective tissue diseases. Four transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Sep 2008]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3335284).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MFAP2	NM_002403.4	c.64G>A	p.Asp22Asn	missense_variant	3/9	ENST00000375535.4
LOC105376806	XR_947003.3	n.703-497C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MFAP2	ENST00000375535.4	c.64G>A	p.Asp22Asn	missense_variant	3/9	1	NM_002403.4	A1
	ENST00000654887.1	n.262-497C>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 18, 2021

The c.64G>A (p.D22N) alteration is located in exon 3 (coding exon 2) of the MFAP2 gene. This alteration results from a G to A substitution at nucleotide position 64, causing the aspartic acid (D) at amino acid position 22 to be replaced by an asparagine (N). 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	Benign	0.13
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.49
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.44	.;T
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.36
FATHMM_MKL	Benign	0.53	D
LIST_S2	Benign	0.74	T;T
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.33	T;T
MetaSVM	Benign	-0.46	T
MutationAssessor	Uncertain	2.1	.;M
MutationTaster	Benign	0.99	D;D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-0.56	N;N
REVEL	Benign	0.12
Sift	Uncertain	0.010	D;D
Sift4G	Benign	0.22	T;T
Polyphen		1.0	.;D
Vest4		0.34
MutPred		0.46		.;Loss of disorder (P = 0.1353);
MVP		0.13
MPC		1.0
ClinPred		0.74	D
GERP RS		4.3
Varity_R		0.097
gMVP		0.40

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-17303667;