15-78105323-G-C

Variant names:

• chr15-78105323-G-C
• rs774734133
• NM_006383.4:c.552C>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_006383.4(CIB2):​c.552C>G​(p.His184Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,780 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. H184H) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CIB2 NM_006383.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.37
• Publications: 0 publications found

Genes affected

CIB2 (HGNC:24579): (calcium and integrin binding family member 2) The protein encoded by this gene is similar to that of KIP/CIB, calcineurin B, and calmodulin. The encoded protein is a calcium-binding regulatory protein that interacts with DNA-dependent protein kinase catalytic subunits (DNA-PKcs), and it is involved in photoreceptor cell maintenance. Mutations in this gene cause deafness, autosomal recessive, 48 (DFNB48), and also Usher syndrome 1J (USH1J). Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2014]

CIB2 Gene-Disease associations (from GenCC):

• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Usher syndrome type 1J

  Inheritance: Unknown, AR Classification: DEFINITIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P
• autosomal recessive nonsyndromic hearing loss 48

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Usher syndrome type 1

  Inheritance: AR Classification: SUPPORTIVE, NO_KNOWN Submitted by: Orphanet, ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 5 uncertain in NM_006383.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3377213).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006383.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CIB2	NM_006383.4	MANE Select	c.552C>G	p.His184Gln	missense	Exon 6 of 6	NP_006374.1	O75838-1
	CIB2	NM_001301224.2		c.567C>G	p.His189Gln	missense	Exon 5 of 5	NP_001288153.1
	CIB2	NM_001271888.2		c.423C>G	p.His141Gln	missense	Exon 5 of 5	NP_001258817.1	O75838-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CIB2	ENST00000258930.8	TSL:1 MANE Select	c.552C>G	p.His184Gln	missense	Exon 6 of 6	ENSP00000258930.3	O75838-1
	CIB2	ENST00000539011.5	TSL:1	c.423C>G	p.His141Gln	missense	Exon 5 of 5	ENSP00000442459.1	O75838-3
	CIB2	ENST00000958911.1		c.549C>G	p.His183Gln	missense	Exon 6 of 6	ENSP00000628970.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461780 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727184

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86234

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53400

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5756

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111966

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Uncertain	0.0
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.26	T
Eigen	Uncertain	0.24
Eigen_PC	Benign	0.21
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.91	D
M_CAP	Uncertain	0.22	D
MetaRNN	Benign	0.34	T
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	1.9	L
PhyloP100		1.4
PrimateAI	Uncertain	0.67	T
PROVEAN	Pathogenic	-5.9	D
REVEL	Benign	0.21
Sift	Benign	0.075	T
Sift4G	Uncertain	0.047	D
Polyphen		0.92	P
Vest4		0.39
MutPred		0.23		Loss of glycosylation at T182 (P = 0.2028)
MVP		0.81
MPC		0.25
ClinPred		0.97	D
GERP RS		2.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.37
gMVP		0.67
Mutation Taster		=31/69	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs774734133; hg19: chr15-78397665;