chr11-6270801-C-T

Position:

chr11-6270801-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_176875.4(CCKBR):c.809C>T(p.Pro270Leu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000192 in 1,613,982 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/25 in silico tools predict a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

CCKBR
NM_176875.4 missense, splice_region

Scores

Splicing: ADA: 0.7086

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.463

Variant links:

Genes affected

CCKBR (HGNC:1571): (cholecystokinin B receptor) This gene encodes a G-protein coupled receptor for gastrin and cholecystokinin (CCK), regulatory peptides of the brain and gastrointestinal tract. This protein is a type B gastrin receptor, which has a high affinity for both sulfated and nonsulfated CCK analogs and is found principally in the central nervous system and the gastrointestinal tract. Alternative splicing results in multiple transcript variants. A misspliced transcript variant including an intron has been observed in cells from colorectal and pancreatic tumors. [provided by RefSeq, Dec 2015]

CCKBR links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.1687218).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CCKBR	NM_176875.4 linkuse as main transcript	c.809C>T	p.Pro270Leu	missense_variant, splice_region_variant	4/5	ENST00000334619.7
CCKBR	NM_001363552.2 linkuse as main transcript	c.809C>T	p.Pro270Leu	missense_variant	4/4
CCKBR	NM_001318029.2 linkuse as main transcript	c.557C>T	p.Pro186Leu	missense_variant, splice_region_variant	3/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCKBR	ENST00000525462.1 linkuse as main transcript	c.809C>T	p.Pro270Leu	missense_variant	4/4	1			P32239-2
CCKBR	ENST00000334619.7 linkuse as main transcript	c.809C>T	p.Pro270Leu	missense_variant, splice_region_variant	4/5	1	NM_176875.4	P1	P32239-1
CCKBR	ENST00000532396.1 linkuse as main transcript	n.26C>T		non_coding_transcript_exon_variant	1/2	1
CCKBR	ENST00000532715.5 linkuse as main transcript	c.557C>T	p.Pro186Leu	missense_variant, splice_region_variant	3/4	3

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152202

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000199

AC:

AN:

251268

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135824

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000198

AC:

AN:

1461780

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727202

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000671

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:

0.0000234

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152202

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74346

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 20, 2023

The c.809C>T (p.P270L) alteration is located in exon 4 (coding exon 4) of the CCKBR gene. This alteration results from a C to T substitution at nucleotide position 809, causing the proline (P) at amino acid position 270 to be replaced by a leucine (L). 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

0.085

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.27

CADD

Benign

DANN

Benign

0.90

DEOGEN2

Benign

0.20

T;.;.

Eigen

Benign

-0.58

Eigen_PC

Benign

-0.62

FATHMM_MKL

Benign

0.44

LIST_S2

Benign

0.78

T;T;T

M_CAP

Benign

0.021

MetaRNN

Benign

0.17

T;T;T

MetaSVM

Benign

-0.79

MutationAssessor

Benign

1.6

L;.;L

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.35

PROVEAN

Benign

-1.8

N;N;N

REVEL

Benign

0.20

Sift

Benign

0.11

T;D;D

Sift4G

Uncertain

0.029

D;D;T

Polyphen

0.0020

B;.;B

Vest4

0.34

MutPred

0.50

Loss of sheet (P = 0.0457);.;Loss of sheet (P = 0.0457);

MVP

0.85

MPC

0.35

ClinPred

0.030

GERP RS

2.4

Varity_R

0.021

gMVP

0.33

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.71

dbscSNV1_RF

Benign

0.67

SpliceAI score (max)

0.32

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.32

Position offset: 2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over