5-157285470-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_001037333.3(CYFIP2):c.109A>G(p.Met37Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000141 in 1,415,156 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M37I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CYFIP2 NM_001037333.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 5.87

Genes affected

CYFIP2 (HGNC:13760): (cytoplasmic FMR1 interacting protein 2) Predicted to enable small GTPase binding activity. Involved in activation of cysteine-type endopeptidase activity; apoptotic process; and cell-cell adhesion. Located in perinuclear region of cytoplasm and synapse. Part of SCAR complex. Implicated in developmental and epileptic encephalopathy 65. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, CYFIP2
• BP4: Computational evidence support a benign effect (MetaRNN=0.27110302).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CYFIP2	NM_001037333.3	c.109A>G	p.Met37Val	missense_variant	2/31	ENST00000620254.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CYFIP2	ENST00000620254.5	c.109A>G	p.Met37Val	missense_variant	2/31	1	NM_001037333.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000141 AC: 2 AN: 1415156 Hom.: 0 Cov.: 30 AF XY: 0.00000143 AC XY: 1 AN XY: 699292

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.19e-7

Gnomad4 OTH exome AF: 0.0000170

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ESP6500AA AF: 0.000239 AC: 1

ESP6500EA AF: 0.00 AC: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Jun 02, 2023	This variant is not present in population databases (gnomAD no frequency). This sequence change replaces methionine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 37 of the CYFIP2 protein (p.Met37Val). This variant has not been reported in the literature in individuals affected with CYFIP2-related conditions. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. ClinVar contains an entry for this variant (Variation ID: 2136240). -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jul 18, 2022	Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.089
BayesDel_addAF	Uncertain	0.068	T
BayesDel_noAF	Benign	-0.14
Cadd	Benign	23
Dann	Benign	0.88
DEOGEN2	Benign	0.13	T;.;.;T;T;T;.;.;.
Eigen	Benign	-0.24
Eigen_PC	Benign	0.044
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.92	D;.;D;D;D;D;D;D;D
M_CAP	Benign	0.0068	T
MetaRNN	Benign	0.27	T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	-1.1	N;N;.;.;.;.;.;.;N
MutationTaster	Benign	1.0	D;D;D;D;D;D;N
PrimateAI	Pathogenic	0.84	D
Sift4G	Benign	0.51	T;T;T;T;T;T;T;T;T
Polyphen		0.0020	B;B;B;.;B;.;.;.;B
Vest4		0.67
MVP		0.65
MPC		1.1
ClinPred		0.82	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.52
gMVP		0.91

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs371710290; hg19: chr5-156712480;