16-74714184-G-A

Variant names:

• chr16-74714184-G-A
• rs367686182
• NM_024306.5:c.*6C>T

Variant summary

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

The NM_024306.5(FA2H):​c.*6C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000716 in 1,396,750 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: FA2H NM_024306.5 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0320
• Publications: 0 publications found

Genes affected

FA2H (HGNC:21197): (fatty acid 2-hydroxylase) This gene encodes a protein that catalyzes the synthesis of 2-hydroxysphingolipids, a subset of sphingolipids that contain 2-hydroxy fatty acids. Sphingolipids play roles in many cellular processes and their structural diversity arises from modification of the hydrophobic ceramide moiety, such as by 2-hydroxylation of the N-acyl chain, and the existence of many different head groups. Mutations in this gene have been associated with leukodystrophy dysmyelinating with spastic paraparesis with or without dystonia.[provided by RefSeq, Mar 2010]

FA2H Gene-Disease associations (from GenCC):

• hereditary spastic paraplegia 35

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen, G2P

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=-0.77).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024306.5. 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
	FA2H	NM_024306.5	MANE Select	c.*6C>T		3_prime_UTR	Exon 7 of 7	NP_077282.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FA2H	ENST00000219368.8	TSL:1 MANE Select	c.*6C>T		3_prime_UTR	Exon 7 of 7	ENSP00000219368.3	Q7L5A8-1
	FA2H	ENST00000562145.1	TSL:1	n.846C>T		non_coding_transcript_exon	Exon 2 of 2
	FA2H	ENST00000888352.1		c.*6C>T		3_prime_UTR	Exon 7 of 7	ENSP00000558411.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.16e-7 AC: 1 AN: 1396750 Hom.: 0 Cov.: 29 AF XY: 0.00000145 AC XY: 1 AN XY: 690162

African (AFR) AF: 0.00 AC: 0 AN: 31728

American (AMR) AF: 0.00 AC: 0 AN: 36352

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25168

East Asian (EAS) AF: 0.00 AC: 0 AN: 36164

South Asian (SAS) AF: 0.00 AC: 0 AN: 79396

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49734

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5504

European-Non Finnish (NFE) AF: 9.30e-7 AC: 1 AN: 1074706

Other (OTH) AF: 0.00 AC: 0 AN: 57998

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.77
CADD	Benign	8.0
DANN	Benign	0.84
PhyloP100		0.032

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs367686182; hg19: chr16-74748082;