8-138132643-G-A

Variant names:

• chr8-138132643-G-A
• NM_015912.4:c.4171C>T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_015912.4(FAM135B):​c.4171C>T​(p.Leu1391Phe) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: FAM135B NM_015912.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.80

Genes affected

FAM135B (HGNC:28029): (family with sequence similarity 135 member B) Predicted to be involved in cellular lipid metabolic process. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.34595254).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAM135B	NM_015912.4	c.4171C>T	p.Leu1391Phe	missense_variant	Exon 20 of 20	ENST00000395297.6	NP_056996.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAM135B	ENST00000395297.6	c.4171C>T	p.Leu1391Phe	missense_variant	Exon 20 of 20	5	NM_015912.4	ENSP00000378710.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Dec 03, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4171C>T (p.L1391F) alteration is located in exon 20 (coding exon 19) of the FAM135B gene. This alteration results from a C to T substitution at nucleotide position 4171, causing the leucine (L) at amino acid position 1391 to be replaced by a phenylalanine (F). 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	Pathogenic	0.76
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.38
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.27	T
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.35	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	2.0	M
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-2.9	D
REVEL	Benign	0.20
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.019	D
Polyphen		1.0	D
Vest4		0.29
MutPred		0.37		Gain of methylation at K1395 (P = 0.0801);
MVP		0.12
MPC		2.1
ClinPred		0.98	D
GERP RS		4.9
Varity_R		0.37
gMVP		0.69

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr8-139144886;