5-115543118-C-G

Position:

• chr5-115543118-C-G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PS1_Moderate PM1 PM2 PP2 PP3 PP5_Moderate

The NM_020177.3(FEM1C):​c.376G>C​(p.Asp126His) 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. Variant has been reported in ClinVar as Likely pathogenic (★). Another nucleotide change resulting in same amino acid change has been previously reported as Likely pathogenicin UniProt.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FEM1C NM_020177.3 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 7.90

Genes affected

FEM1C (HGNC:16933): (fem-1 homolog C) Enables ubiquitin ligase-substrate adaptor activity. Involved in ubiquitin-dependent protein catabolic process via the C-end degron rule pathway. Located in cytosol and nucleoplasm. Part of Cul2-RING ubiquitin ligase complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PS1: Transcript NM_020177.3 (FEM1C) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in UniProt
• PM1: In a mutagenesis_site Reduced binding to C-degron with an arginine at the C-terminus. Abolished binding to C-degron with an arginine at the C-terminus; when associated with A-77. (size 0) in uniprot entity FEM1C_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), FEM1C. . Gene score misZ 2.4311 (greater than the threshold 3.09). Trascript score misZ 3.3305 (greater than threshold 3.09). GenCC has associacion of gene with complex neurodevelopmental disorder.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.759
• PP5: Variant 5-115543118-C-G is Pathogenic according to our data. Variant chr5-115543118-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2504571.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FEM1C	NM_020177.3	c.376G>C	p.Asp126His	missense_variant	2/3	ENST00000274457.5	NP_064562.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FEM1C	ENST00000274457.5	c.376G>C	p.Asp126His	missense_variant	2/3	1	NM_020177.3	ENSP00000274457.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Neurodevelopmental disorder Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Oct 10, 2024

Based on the classification scheme VCGS_Germline_v1.3.5, this variant is classified as Likely pathogenic. Following criteria are met: 0105 - The mechanism of disease for this gene is not clearly established. (I) 0107 - This gene is associated with autosomal dominant disease. (I) 0200 - Variant is predicted to result in a missense amino acid change from aspartic acid to histidine. (I) 0251 - This variant is heterozygous. (I) 0301 - Variant is absent from gnomAD (v2, v3 and v4). (SP) 0502 - Missense variant with conflicting in silico predictions and uninformative conservation. (I) 0603 - Missense variant in a region that is highly intolerant to missense variation (high constraint region in DECIPHER). (SP) 0704 - Another missense variant comparable to the one identified in this case has limited previous evidence for pathogenicity. p.(Asp126Val) has been reported de novo in an individual with an uncharacterised developmental disorder (PMID: 28135719). p.(Asp126Asn) has also been reported as a VUS (ClinVar). (SP) 0802 - This variant has moderate previous evidence of pathogenicity in an unrelated individual. This variant has been reported de novo in an individual with severe developmental delay, absent speech, pyramidal signs and limb ataxia (PMID: 36336956). (SP) 0905 - No published segregation evidence has been identified for this variant. (I) 1002 - This variant has moderate functional evidence supporting abnormal protein function. The equivalent variant introduced into the nematode C.elegans resulted in impaired locomotion suggested to be caused by synaptic abnormalities rather than muscle dysfunction (PMID: 36336956). (SP) 1203 - This variant has been shown to be de novo in the proband (parental status confirmed) (by trio analysis). (SP) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

not provided Uncertain:1

Uncertain significance, no assertion criteria provided

literature only

OMIM

Jun 06, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.19
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.19	T
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.044	D
MetaRNN	Pathogenic	0.76	D
MetaSVM	Benign	-0.42	T
MutationAssessor	Benign	-0.81	N
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-5.6	D
REVEL	Uncertain	0.59
Sift	Uncertain	0.0020	D
Sift4G	Benign	0.069	T
Polyphen		1.0	D
Vest4		0.76
MutPred		0.51		Gain of methylation at R121 (P = 0.1136);
MVP		0.79
MPC		1.4
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.83
gMVP		0.83

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: chr5-114878815;