rs2277820

Variant names:

• chr21-46155458-C-A
• rs2277820
• NM_206965.2:c.54+12G>T

Your query was ambiguous. Multiple possible variants found:

• chr21-46155458-C-A
• chr21-46155458-C-T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_206965.2(FTCD):​c.54+12G>T variant causes a intron 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 34)
• Consequence: FTCD NM_206965.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.158
• Publications: 22 publications found

Genes affected

FTCD (HGNC:3974): (formimidoyltransferase cyclodeaminase) The protein encoded by this gene is a bifunctional enzyme that channels 1-carbon units from formiminoglutamate, a metabolite of the histidine degradation pathway, to the folate pool. Mutations in this gene are associated with glutamate formiminotransferase deficiency. Alternatively spliced transcript variants have been found for this gene.[provided by RefSeq, Dec 2009]

FTCD Gene-Disease associations (from GenCC):

• formiminoglutamic aciduria

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Orphanet, Laboratory for Molecular Medicine

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FTCD	NM_206965.2	c.54+12G>T		intron_variant	Intron 1 of 13	ENST00000397746.8	NP_996848.1
FTCD	NM_001320412.2	c.54+12G>T		intron_variant	Intron 1 of 14		NP_001307341.1
FTCD	NM_006657.3	c.54+12G>T		intron_variant	Intron 1 of 14		NP_006648.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FTCD	ENST00000397746.8	c.54+12G>T		intron_variant	Intron 1 of 13	1	NM_206965.2	ENSP00000380854.3

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	3.9
DANN	Benign	0.73
PhyloP100		-0.16
PromoterAI		0.020	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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

Other links and lift over

dbSNP: rs2277820; hg19: chr21-47575372;