2-46917202-C-T

Variant names:

• chr2-46917202-C-T
• rs1300459632
• NM_001288953.2:c.7C>T

Variant summary

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

The NM_001288953.2(TTC7A):​c.7C>T​(p.Pro3Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000728 in 549,740 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/16 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000073 (0 hom.)
• Consequence: TTC7A NM_001288953.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.505
• Publications: 0 publications found

Genes affected

TTC7A (HGNC:19750): (tetratricopeptide repeat domain 7A) This gene encodes a protein containing tetratricopeptide repeats. Mutations in this gene disrupt intestinal development and can cause early onset inflammatory bowel disease and intestinal atresia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jun 2014]

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]

MCFD2 Gene-Disease associations (from GenCC):

• factor 5 and Factor VIII, combined deficiency of, 2

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp
• combined deficiency of factor V and factor VIII

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

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=0.14371273).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001288953.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TTC7A	NM_001288953.2		c.7C>T	p.Pro3Ser	missense	Exon 2 of 21	NP_001275882.1	G5E9G4
	MCFD2	NM_001171508.2		c.-6-8025G>A		intron	N/A	NP_001164979.1	Q8NI22-1
	MCFD2	NM_001171511.3		c.93-9233G>A		intron	N/A	NP_001164982.1	Q8NI22-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TTC7A	ENST00000409245.5	TSL:2	c.7C>T	p.Pro3Ser	missense	Exon 2 of 21	ENSP00000386307.1	G5E9G4
	MCFD2	ENST00000409207.5	TSL:2	c.-6-8025G>A		intron	N/A	ENSP00000386386.1	Q8NI22-1
	MCFD2	ENST00000895741.1		c.-100-6329G>A		intron	N/A	ENSP00000565800.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000728 AC: 4 AN: 549740 Hom.: 0 Cov.: 0 AF XY: 0.0000134 AC XY: 4 AN XY: 297664

African (AFR) AF: 0.00 AC: 0 AN: 15700

American (AMR) AF: 0.000116 AC: 4 AN: 34584

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 20012

East Asian (EAS) AF: 0.00 AC: 0 AN: 31998

South Asian (SAS) AF: 0.00 AC: 0 AN: 62644

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33464

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4044

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 316716

Other (OTH) AF: 0.00 AC: 0 AN: 30578

GnomAD4 genome Cov.: 31

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.36	T
BayesDel_noAF	Benign	-0.76
CADD	Benign	8.1
DANN	Benign	0.56
Eigen	Benign	-0.52
Eigen_PC	Benign	-0.83
FATHMM_MKL	Benign	0.0019	N
LIST_S2	Benign	0.38	T
M_CAP	Benign	0.00089	T
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-1.0	T
PhyloP100		-0.51
PROVEAN	Benign	0.23	N
REVEL	Benign	0.057
Sift	Pathogenic	0.0	D
Sift4G	Benign	1.0	T
Polyphen		0.94	P
Vest4		0.10
MutPred		0.23		Gain of phosphorylation at P3 (P = 0.0187)
MVP		0.35
ClinPred		0.13	T
GERP RS		0.23
Mutation Taster		=100/0	polymorphism

Splicing

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

Other links and lift over

dbSNP: rs1300459632; hg19: chr2-47144341;