Variant 1-113904681-G-T details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_001253852.3(AP4B1):c.37C>A(p.Leu13Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,460,492 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. L13P) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

AP4B1
NM_001253852.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.63

Variant links:

Genes affected

AP4B1 (HGNC:572): (adaptor related protein complex 4 subunit beta 1) This gene encodes a subunit of a heterotetrameric adapter-like complex 4 that is involved in targeting proteins from the trans-Golgi network to the endosomal-lysosomal system. Mutations in this gene are associated with cerebral palsy spastic quadriplegic type 5 (CPSQ5) disorder. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2011]

AP4B1 links:

DCLRE1B (HGNC:17641): (DNA cross-link repair 1B) DNA interstrand cross-links prevent strand separation, thereby physically blocking transcription, replication, and segregation of DNA. DCLRE1B is one of several evolutionarily conserved genes involved in repair of interstrand cross-links (Dronkert et al., 2000 [PubMed 10848582]).[supplied by OMIM, Mar 2008]

DCLRE1B links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AP4B1	NM_001253852.3 linkuse as main transcript	c.37C>A	p.Leu13Met	missense_variant	1/10	ENST00000369569.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AP4B1	ENST00000369569.6 linkuse as main transcript	c.37C>A	p.Leu13Met	missense_variant	1/10	1	NM_001253852.3	P1	Q9Y6B7-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1460492

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726562

show subpopulations

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:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 47

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Neuberg Centre For Genomic Medicine, NCGM

The missense variant in c.37C>A(p.Leu13Met) in AP4B1 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The p.Leu13Met variant is novel (not in any individuals) in gnomAD Exomes and 1000 Genomes. The amino acid Leu at position 13 is changed to a Met changing protein sequence and it might alter its composition and physico-chemical properties. The variant is predicted to be damaging by both SIFT and PolyPhen2. The residue is conserved across species. The amino acid change p.Leu13Met in AP4B1 is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. For these reasons, this variant has been classified as Uncertain Significance -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.26

BayesDel_addAF

Uncertain

0.054

BayesDel_noAF

Benign

-0.16

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.17

T;T;T;T;T;T

Eigen

Benign

0.11

Eigen_PC

Benign

0.042

FATHMM_MKL

Benign

0.46

LIST_S2

Benign

0.85

T;.;T;T;T;T

M_CAP

Benign

0.065

MetaRNN

Uncertain

0.51

D;D;D;D;D;D

MetaSVM

Benign

-0.48

MutationTaster

Benign

1.0

D;D;N;N

PrimateAI

Pathogenic

0.80

PROVEAN

Benign

-0.010

N;N;N;N;N;N

REVEL

Uncertain

0.37

Sift

Pathogenic

0.0

D;D;D;D;D;D

Sift4G

Benign

0.17

T;D;D;.;.;.

Polyphen

1.0

D;D;D;.;.;.

Vest4

0.43

MutPred

0.69

Gain of methylation at K11 (P = 0.0558);Gain of methylation at K11 (P = 0.0558);Gain of methylation at K11 (P = 0.0558);Gain of methylation at K11 (P = 0.0558);Gain of methylation at K11 (P = 0.0558);Gain of methylation at K11 (P = 0.0558);

MVP

0.67

MPC

0.57

ClinPred

0.98

GERP RS

2.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.70

gMVP

0.41

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over