dbSNP rs141754568: AP4M1:p.Arg310Arg (chr7-100105959-G-A) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_ModerateBP6BP7BS1BS2

The NM_004722.4(AP4M1):c.930G>A(p.Arg310Arg) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000616 in 1,614,142 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00064 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00061 ( 10 hom. )

Consequence

AP4M1
NM_004722.4 splice_region, synonymous

Scores

Splicing: ADA: 0.02884

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:4

Conservation

PhyloP100: 3.38

Publications

4 publications found

Variant links:

Genes affected

AP4M1 (HGNC:574): (adaptor related protein complex 4 subunit mu 1) This gene encodes a subunit of the heterotetrameric AP-4 complex. The encoded protein belongs to the adaptor complexes medium subunits family. This AP-4 complex is involved in the recognition and sorting of cargo proteins with tyrosine-based motifs from the trans-golgi network to the endosomal-lysosomal system. [provided by RefSeq, Jul 2008]

AP4M1 Gene-Disease associations (from GenCC):

AP-4 deficiency syndrome
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hereditary spastic paraplegia 50
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
AP4-related intellectual disability and spastic paraplegia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

AP4M1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (REVEL=0.166).

BP6

Variant 7-100105959-G-A is Benign according to our data. Variant chr7-100105959-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 218652.

BP7

Synonymous conserved (PhyloP=3.38 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000644 (98/152270) while in subpopulation SAS AF = 0.00228 (11/4830). AF 95% confidence interval is 0.00128. There are 0 homozygotes in GnomAd4. There are 56 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 10 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004722.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
AP4M1	NM_004722.4	MANE Select	c.930G>A	p.Arg310Arg	splice_region synonymous	Exon 12 of 15	NP_004713.2
AP4M1	NM_001363671.2		c.951G>A	p.Arg317Arg	splice_region synonymous	Exon 12 of 15	NP_001350600.1	C9JC87
AP4M1	NM_001438824.1		c.951G>A	p.Arg317Arg	splice_region synonymous	Exon 13 of 16	NP_001425753.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
AP4M1	ENST00000359593.9	TSL:1 MANE Select	c.930G>A	p.Arg310Arg	splice_region synonymous	Exon 12 of 15	ENSP00000352603.4	O00189
AP4M1	ENST00000421755.5	TSL:1	c.930G>A	p.Arg310Arg	splice_region synonymous	Exon 12 of 16	ENSP00000412185.1	O00189
AP4M1	ENST00000429084.5	TSL:5	c.951G>A	p.Arg317Arg	splice_region synonymous	Exon 12 of 15	ENSP00000403663.1	C9JC87

Frequencies

GnomAD3 genomes

AF:

0.000651

AC:

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00144

Gnomad ASJ

AF:

0.00461

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00228

Gnomad FIN

AF:

0.000943

Gnomad MID

AF:

0.0190

Gnomad NFE

AF:

0.000412

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.000736

AC:

185

AN:

251490

AF XY:

0.000883

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000954

Gnomad ASJ exome

AF:

0.00208

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00134

Gnomad NFE exome

AF:

0.000272

Gnomad OTH exome

AF:

0.000652

GnomAD4 exome

AF:

0.000613

AC:

896

AN:

1461872

Hom.:

Cov.:

AF XY:

0.000682

AC XY:

496

AN XY:

727232

show subpopulations

African (AFR)

AF:

0.000299

AC:

AN:

33480

American (AMR)

AF:

0.00107

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00203

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000756

AC:

AN:

39700

South Asian (SAS)

AF:

0.00225

AC:

194

AN:

86256

European-Finnish (FIN)

AF:

0.000824

AC:

AN:

53408

Middle Eastern (MID)

AF:

0.0182

AC:

105

AN:

5768

European-Non Finnish (NFE)

AF:

0.000342

AC:

380

AN:

1112004

Other (OTH)

AF:

0.000977

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

102

154

205

256

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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:

0.000644

AC:

AN:

152270

Hom.:

Cov.:

AF XY:

0.000752

AC XY:

AN XY:

74450

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41566

American (AMR)

AF:

0.00144

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00461

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00228

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.000943

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.0170

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000412

AC:

AN:

68006

Other (OTH)

AF:

0.00237

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.000642

Hom.:

Bravo

AF:

0.000491

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.000981

EpiControl

AF:

0.000533

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (2)

AP4M1-related disorder (1)

Hereditary spastic paraplegia (1)

Hereditary spastic paraplegia 50 (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.42

CADD

Benign

(source)

DANN

Benign

0.75

PhyloP100

3.4

Mutation Taster

=56/44

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.029

dbscSNV1_RF

Benign

0.22

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

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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