Genetic Variant BBIP1:p.Ala64Gly (chr10-110907683-G-C) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_001195304.2(BBIP1):c.191C>G(p.Ala64Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000203 in 680,998 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/18 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. A64V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00025 ( 3 hom. )

Consequence

BBIP1
NM_001195304.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2B:1

Conservation

PhyloP100: 0.124

Publications

1 publications found

Variant links:

Genes affected

BBIP1 (HGNC:28093): (BBSome interacting protein 1) This gene encodes one of eight proteins that form the BBSome complex and is essential for its assembly. The BBSome complex is involved in trafficking signal receptors to and from the cilia. Mutations in this gene result in Bardet-Biedl syndrome 18. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2014]

BBIP1 Gene-Disease associations (from GenCC):

Bardet-Biedl syndrome 18
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
Bardet-Biedl syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

BBIP1 links:

ENSG00000278601 (HGNC:):

ENSG00000278601 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.006947547).

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001195304.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
BBIP1	NM_001195305.3	MANE Select	c.38-6071C>G		intron	N/A	NP_001182234.1	A8MTZ0-1
BBIP1	NM_001195304.2		c.191C>G	p.Ala64Gly	missense	Exon 3 of 5	NP_001182233.1	A8MTZ0-4
BBIP1	NM_001195306.2		c.38-6071C>G		intron	N/A	NP_001182235.1	A8MTZ0-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
BBIP1	ENST00000454061.5	TSL:1	c.191C>G	p.Ala64Gly	missense	Exon 3 of 5	ENSP00000433157.1	A8MTZ0-4
BBIP1	ENST00000448814.7	TSL:1 MANE Select	c.38-6071C>G		intron	N/A	ENSP00000436622.2	A8MTZ0-1
BBIP1	ENST00000605742.5	TSL:1	c.38-6071C>G		intron	N/A	ENSP00000474675.1	A8MTZ0-1

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152028

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00166

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000326

AC:

AN:

113646

AF XY:

0.000483

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000283

GnomAD4 exome

AF:

0.000246

AC:

130

AN:

528852

Hom.:

Cov.:

AF XY:

0.000352

AC XY:

101

AN XY:

286768

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

14472

American (AMR)

AF:

0.00

AC:

AN:

29190

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

18988

East Asian (EAS)

AF:

0.00

AC:

AN:

31468

South Asian (SAS)

AF:

0.00219

AC:

127

AN:

58108

European-Finnish (FIN)

AF:

0.00

AC:

AN:

33274

Middle Eastern (MID)

AF:

0.000253

AC:

AN:

3954

European-Non Finnish (NFE)

AF:

0.00000323

AC:

AN:

309740

Other (OTH)

AF:

0.0000337

AC:

AN:

29658

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.519

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152146

Hom.:

Cov.:

AF XY:

0.0000941

AC XY:

AN XY:

74358

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41520

American (AMR)

AF:

0.00

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00166

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10552

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67998

Other (OTH)

AF:

0.00

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.537

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:

0.00

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.00101

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Bardet-Biedl syndrome 18 (2)

BBIP1-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.33

BayesDel_addAF

Benign

-0.62

BayesDel_noAF

Benign

-0.66

CADD

Benign

0.99

(source)

DANN

Benign

0.75

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.0072

M_CAP

Benign

0.00090

MetaRNN

Benign

0.0069

MetaSVM

Benign

-1.0

PhyloP100

0.12

PROVEAN

Benign

1.0

REVEL

Benign

0.012

Vest4

0.13

MutPred

0.35

Gain of loop (P = 0.0013)

MVP

0.014

ClinPred

0.016

GERP RS

-0.077

gMVP

0.0018

Mutation Taster

=100/0

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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