NM_005449.5:c.1006C>G

Variant names:

• chr1-206909500-G-C
• NM_005449.5:c.1006C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005449.5(FCMR):​c.1006C>G​(p.Pro336Ala) 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. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: FCMR NM_005449.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.252
• Publications: 0 publications found

Genes affected

FCMR (HGNC:14315): (Fc mu receptor) Fc receptors specifically bind to the Fc region of immunoglobulins (Igs) to mediate the unique functions of each Ig class. FAIM3 encodes an Fc receptor for IgM (see MIM 147020) (Kubagawa et al., 2009 [PubMed 19858324]; Shima et al., 2010 [PubMed 20042454]).[supplied by OMIM, Jul 2010]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.078897834).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FCMR	NM_005449.5	c.1006C>G	p.Pro336Ala	missense_variant	Exon 7 of 8	ENST00000367091.8	NP_005440.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FCMR	ENST00000367091.8	c.1006C>G	p.Pro336Ala	missense_variant	Exon 7 of 8	1	NM_005449.5	ENSP00000356058.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Oct 10, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1006C>G (p.P336A) alteration is located in exon 7 (coding exon 7) of the FCMR gene. This alteration results from a C to G substitution at nucleotide position 1006, causing the proline (P) at amino acid position 336 to be replaced by an alanine (A). 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	0.061
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.73
CADD	Benign	2.7
DANN	Benign	0.48
DEOGEN2	Benign	0.073	T;.
Eigen	Benign	-0.73
Eigen_PC	Benign	-0.91
FATHMM_MKL	Benign	0.077	N
LIST_S2	Benign	0.56	T;T
M_CAP	Benign	0.045	D
MetaRNN	Benign	0.079	T;T
MetaSVM	Benign	-0.99	T
PhyloP100		-0.25
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-0.98	N;D
REVEL	Benign	0.015
Sift	Benign	1.0	T;T
Sift4G	Benign	0.84	T;T
Polyphen		0.075	B;.
Vest4		0.13
MutPred		0.11		Loss of glycosylation at P338 (P = 0.1625);.;
MVP		0.18
MPC		0.21
ClinPred		0.035	T
GERP RS		-1.2
Varity_R		0.038
gMVP		0.070
Mutation Taster		=96/4	polymorphism

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

Other links and lift over

hg19: chr1-207082845;