2-46907878-C-G

Variant names:

• chr2-46907878-C-G
• rs78289603
• NM_139279.6:c.241G>C

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PS1_Moderate PM1 PM2 PP3_Strong

The NM_139279.6(MCFD2):​c.241G>C​(p.Asp81His) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in UniProt.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MCFD2 NM_139279.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.33

Genes affected

MCFD2 (HGNC:18451): (multiple coagulation factor deficiency 2, ER cargo receptor complex subunit) This gene encodes a soluble luminal protein with two calmodulin-like EF-hand motifs at its C-terminus. This protein forms a complex with LMAN1 (lectin mannose binding protein 1; also known as ERGIC-53) that facilitates the transport of coagulation factors V (FV) and VIII (FVIII) from the endoplasmic reticulum to the Golgi apparatus via an endoplasmic reticulum Golgi intermediate compartment (ERGIC). Mutations in this gene cause combined deficiency of FV and FVIII (F5F8D); a rare autosomal recessive bleeding disorder characterized by mild to moderate bleeding and coordinate reduction in plasma FV and FVIII levels. This protein has also been shown to maintain stem cell potential in adult central nervous system and is a marker for testicular germ cell tumors. The 3' UTR of this gene contains a transposon-like human repeat element named 'THE 1'. A processed RNA pseudogene of this gene is on chromosome 6p22.1. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Apr 2016]

ENSG00000228925 (HGNC:58223):

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PS1: Transcript NM_139279.6 (MCFD2) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in UniProt
• PM1: In a binding_site (size 0) in uniprot entity MCFD2_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.989

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MCFD2	NM_139279.6	c.241G>C	p.Asp81His	missense_variant	Exon 3 of 4	ENST00000319466.9	NP_644808.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MCFD2	ENST00000319466.9	c.241G>C	p.Asp81His	missense_variant	Exon 3 of 4	1	NM_139279.6	ENSP00000317271.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.57	D
BayesDel_noAF	Pathogenic	0.59
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.85	.;D;.;D;.;.;D;D;.;D;D;D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.97
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;.;.;.;.;D;.;.;D;.;D;D
M_CAP	Pathogenic	0.67	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.4	.;H;.;H;.;.;H;H;.;H;H;.
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-7.0	D;D;D;D;D;.;D;D;D;D;D;D
REVEL	Pathogenic	0.96
Sift	Pathogenic	0.0	D;D;D;D;D;.;D;D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D;.;D;D;D;D;D;D
Polyphen		1.0	.;D;.;D;.;.;D;D;.;D;D;.
Vest4		1.0
MutPred		0.93		.;Loss of phosphorylation at Y82 (P = 0.1111);.;Loss of phosphorylation at Y82 (P = 0.1111);.;Loss of phosphorylation at Y82 (P = 0.1111);Loss of phosphorylation at Y82 (P = 0.1111);Loss of phosphorylation at Y82 (P = 0.1111);.;Loss of phosphorylation at Y82 (P = 0.1111);Loss of phosphorylation at Y82 (P = 0.1111);.;
MVP		1.0
MPC		0.20
ClinPred		1.0	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.98
gMVP		0.93

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

Other links and lift over

dbSNP: rs78289603; hg19: chr2-47135017;