16-66469703-A-G

Position:

• chr16-66469703-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001178020.3(BEAN1):​c.127A>G​(p.Ile43Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000723 in 1,383,850 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: BEAN1 NM_001178020.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.86

Genes affected

BEAN1 (HGNC:24160): (brain expressed associated with NEDD4 1) The protein encoded by this gene is one of several proteins that interact with NEDD4, a member of a family of ubiquitin-protein ligases. These proteins have PY motifs in common that bind to the WW domains of NEDD4. NEDD4 is developmentally regulated, and is highly expressed in embryonic tissues. Mutations in this gene (i.e., intronic insertions of >100 copies of pentanucleotide repeats including a (TGGAA)n sequence) are associated with spinocerebellar ataxia type 31. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2010]

LOC124903698 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.18872726).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BEAN1	NM_001178020.3	c.127A>G	p.Ile43Val	missense_variant	3/5	ENST00000536005.7	NP_001171491.1
LOC124903698	XM_047435016.1	c.*5403T>C		3_prime_UTR_variant	5/5		XP_047290972.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BEAN1	ENST00000536005.7	c.127A>G	p.Ile43Val	missense_variant	3/5	1	NM_001178020.3	ENSP00000442793	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.23e-7 AC: 1 AN: 1383850 Hom.: 0 Cov.: 32 AF XY: 0.00000146 AC XY: 1 AN XY: 682864

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000280

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 23, 2024

The c.127A>G (p.I43V) alteration is located in exon 3 (coding exon 2) of the BEAN1 gene. This alteration results from a A to G substitution at nucleotide position 127, causing the isoleucine (I) at amino acid position 43 to be replaced by a valine (V). 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	Benign	0.31
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.17	T
Eigen	Benign	0.083
Eigen_PC	Benign	0.16
FATHMM_MKL	Uncertain	0.76	D
LIST_S2	Benign	0.58	T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.19	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	2.0	M
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-0.70	N
REVEL	Benign	0.077
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.053	T
Vest4		0.31
MutPred		0.28		Loss of sheet (P = 0.1398);
MVP		0.072
ClinPred		0.70	D
GERP RS		4.1
Varity_R		0.31
gMVP		0.49

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

LitVar

Other links and lift over

dbSNP: rs1963394475; hg19: chr16-66503606;