dbSNP rs143286419: AP4B1:p.Thr256Ile (chr1-113900251-G-A) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001253852.3(AP4B1):c.767C>T(p.Thr256Ile) variant causes a missense change. The variant allele was found at a frequency of 0.00134 in 1,607,830 control chromosomes in the GnomAD database, including 15 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0014 ( 2 hom., cov: 32)

Exomes 𝑓: 0.0013 ( 13 hom. )

Consequence

AP4B1
NM_001253852.3 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:10

Conservation

PhyloP100: 5.95

Publications

7 publications found

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:

AP4B1-AS1 (HGNC:44114): (AP4B1 antisense RNA 1)

AP4B1-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009812593).

BP6

Variant 1-113900251-G-A is Benign according to our data. Variant chr1-113900251-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 218686.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.00145 (220/152234) while in subpopulation AMR AF = 0.00393 (60/15278). AF 95% confidence interval is 0.00313. There are 2 homozygotes in GnomAd4. There are 124 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 2 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001253852.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
AP4B1	NM_001253852.3	MANE Select	c.767C>T	p.Thr256Ile	missense	Exon 5 of 10	NP_001240781.1	Q9Y6B7-1
AP4B1	NM_001438373.1		c.767C>T	p.Thr256Ile	missense	Exon 6 of 11	NP_001425302.1
AP4B1	NM_006594.5		c.767C>T	p.Thr256Ile	missense	Exon 6 of 11	NP_006585.2	Q9Y6B7-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
AP4B1	ENST00000369569.6	TSL:1 MANE Select	c.767C>T	p.Thr256Ile	missense	Exon 5 of 10	ENSP00000358582.1	Q9Y6B7-1
AP4B1	ENST00000256658.8	TSL:1	c.767C>T	p.Thr256Ile	missense	Exon 6 of 11	ENSP00000256658.4	Q9Y6B7-1
AP4B1	ENST00000863127.1		c.767C>T	p.Thr256Ile	missense	Exon 5 of 11	ENSP00000533186.1

Frequencies

GnomAD3 genomes

AF:

0.00145

AC:

220

AN:

152116

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000845

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00393

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00249

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0190

Gnomad NFE

AF:

0.00144

Gnomad OTH

AF:

0.00384

GnomAD2 exomes

AF:

0.00141

AC:

352

AN:

248820

AF XY:

0.00157

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.00270

Gnomad ASJ exome

AF:

0.00233

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00149

Gnomad OTH exome

AF:

0.00281

GnomAD4 exome

AF:

0.00133

AC:

1932

AN:

1455596

Hom.:

Cov.:

AF XY:

0.00138

AC XY:

1000

AN XY:

723218

show subpopulations

African (AFR)

AF:

0.00154

AC:

AN:

33166

American (AMR)

AF:

0.00293

AC:

129

AN:

44098

Ashkenazi Jewish (ASJ)

AF:

0.00193

AC:

AN:

25930

East Asian (EAS)

AF:

0.00

AC:

AN:

39592

South Asian (SAS)

AF:

0.00178

AC:

153

AN:

85756

European-Finnish (FIN)

AF:

0.0000188

AC:

AN:

53306

Middle Eastern (MID)

AF:

0.0342

AC:

196

AN:

5728

European-Non Finnish (NFE)

AF:

0.00109

AC:

1211

AN:

1107952

Other (OTH)

AF:

0.00235

AC:

141

AN:

60068

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

113

226

339

452

565

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

132

176

220

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00145

AC:

220

AN:

152234

Hom.:

Cov.:

AF XY:

0.00167

AC XY:

124

AN XY:

74432

show subpopulations

African (AFR)

AF:

0.000842

AC:

AN:

41552

American (AMR)

AF:

0.00393

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.000288

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00249

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.0204

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00144

AC:

AN:

68008

Other (OTH)

AF:

0.00380

AC:

AN:

2104

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00156

Hom.:

Bravo

AF:

0.00162

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.00156

AC:

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00140

AC:

ExAC

AF:

0.00132

AC:

160

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.00240

EpiControl

AF:

0.00225

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (3)

Hereditary spastic paraplegia 47 (2)

not provided (2)

AP4B1-related disorder (1)

Hereditary spastic paraplegia (1)

Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.30

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.41

CADD

Benign

(source)

DANN

Benign

0.90

DEOGEN2

Benign

0.062

Eigen

Benign

-0.19

Eigen_PC

Benign

0.052

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.92

M_CAP

Benign

0.011

MetaRNN

Benign

0.0098

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.19

PhyloP100

6.0

PrimateAI

Uncertain

0.53

PROVEAN

Benign

0.72

REVEL

Benign

0.18

Sift

Benign

0.45

Sift4G

Benign

0.52

Polyphen

0.014

Vest4

0.78

MVP

0.48

MPC

0.14

ClinPred

0.025

GERP RS

5.1

Varity_R

0.19

gMVP

0.23

Mutation Taster

=82/18

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over