11-64342040-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_032251.6(CCDC88B):c.722C>T(p.Pro241Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000881 in 1,612,582 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000088 ( 0 hom. )

Consequence

CCDC88B
NM_032251.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.884

Variant links:

Genes affected

CCDC88B (HGNC:26757): (coiled-coil domain containing 88B) This gene encodes a member of the hook-related protein family. Members of this family are characterized by an N-terminal potential microtubule binding domain, a central coiled-coiled and a C-terminal Hook-related domain. The encoded protein may be involved in linking organelles to microtubules. [provided by RefSeq, Oct 2009]

CCDC88B links:

MIR7155 (HGNC:50005): (microRNA 7155) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

MIR7155 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0439997).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCDC88B	NM_032251.6 link	c.722C>T	p.Pro241Leu	missense_variant	Exon 8 of 27	ENST00000356786.10	NP_115627.6	A6NC98-1B2RTU8
MIR7155	NR_106977.1 link	n.-136G>A		upstream_gene_variant
MIR7155	unassigned_transcript_1890	n.-173G>A		upstream_gene_variant
MIR7155	unassigned_transcript_1891	n.-136G>A		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CCDC88B	ENST00000356786.10 link	c.722C>T	p.Pro241Leu	missense_variant	Exon 8 of 27	1	NM_032251.6	ENSP00000349238.5	A6NC98-1
CCDC88B	ENST00000463837.5 link	n.766C>T		non_coding_transcript_exon_variant	Exon 8 of 25	2
CCDC88B	ENST00000494080.5 link	n.184C>T		non_coding_transcript_exon_variant	Exon 2 of 20	2
MIR7155	ENST00000615925.1 link	n.-136G>A		upstream_gene_variant		6

Frequencies

GnomAD3 genomes

AF:

0.0000922

AC:

AN:

151762

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000141

AC:

AN:

248104

Hom.:

AF XY:

0.000148

AC XY:

AN XY:

135008

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000871

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000556

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000108

Gnomad OTH exome

AF:

0.000495

GnomAD4 exome

AF:

0.0000876

AC:

128

AN:

1460700

Hom.:

Cov.:

AF XY:

0.000111

AC XY:

AN XY:

726662

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000522

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000459

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.0000922

AC:

AN:

151882

Hom.:

Cov.:

AF XY:

0.0000943

AC XY:

AN XY:

74254

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000622

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000153

Hom.:

Bravo

AF:

0.0000340

ExAC

AF:

0.000173

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 28, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.722C>T (p.P241L) alteration is located in exon 8 (coding exon 8) of the CCDC88B gene. This alteration results from a C to T substitution at nucleotide position 722, causing the proline (P) at amino acid position 241 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

0.097

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.39

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.035

Eigen

Benign

-0.44

Eigen_PC

Benign

-0.60

FATHMM_MKL

Benign

0.17

LIST_S2

Benign

0.60

M_CAP

Benign

0.026

MetaRNN

Benign

0.044

MetaSVM

Benign

-0.94

MutationAssessor

Benign

1.6

PrimateAI

Uncertain

0.66

PROVEAN

Uncertain

-4.2

REVEL

Benign

0.10

Sift

Uncertain

0.0030

Sift4G

Uncertain

0.016

Polyphen

0.69

Vest4

0.26

MVP

0.25

MPC

0.57

ClinPred

0.084

GERP RS

2.0

Varity_R

0.23

gMVP

0.49

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

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