Table 2.
CIB2 Variants and Phenotype Correlation
| Family | Phenotype | Origin | gDNA | cDNA | Protein | Type | Domain | gnomAD (%) |
Conservation | Deleterious | REF | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GERP | PhyloP | PP2 | SIFT | MT | LRT | CADD | ||||||||||
| L-3156 | NSHL | Iranian | 78413407_78416520del | c.52_86del | p.Asp18Alafs*7 | CNV/frameshift | 0 | - | - | - | - | - | - | - | This study | |
| Trio-B | NSHL | European American | 78403509G>A | c.196C>T | p.Arg66Trp | missense | EF-1 | 0.002 | C | C | D | D | D | D | 34 | This study + [14] |
| 78401614_78401623del | c.300_309del | p.Glu100fs*28 | frameshift | EF-2 | 0.006 | - | - | - | - | - | - | 35 | This study | |||
| Trio-C | NSHL | European | 78401700C>T | c.223G>A | p.Val75Met | missense | EF-1 | 0.003 | C | C | D | D | D | D | 29.7 | This study + [17] |
| 51550 | NSHL | European American | 78403506C>T | c.198+1G>A | splice-site | 0 | C | C | - | - | D | - | 25.3 | This study | ||
| 661 | NSHL | Turkish | 78401593A>T | c.330T>A | p.Tyr110Ter | nonsense | EF-2 | 0 | C | C | - | - | - | - | 36 | |
| L-1644 | NSHL | Iranian | 78401579T>C | c.344A>G | p.Tyr115Cys | missense | EF-2 | 0 | C | C | D | D | D | D | 27 | |
| 07-1069 | NSHL | Dutch | 78403608G>A | c.97C>T | p.Arg33Ter | nonsense | 0.006 | C | C | - | - | - | D | 36 | [14] | |
| PKDF117 | USH1 | Pakistani | 78403513C>G | c.192G>C | p.Glu64Asp | missense | 0.0004 | C | C | D | D | D | D | 24 | [12] | |
| PKDF* | NSHL | Pakistani | 78401651A>G | c.272T>C | p.Phe91Ser | missense | EF-1 | 0.003 | C | C | D | D | D | D | 29.9 | |
| DEM4025 DEM4225 |
NSHL | Pakistani | 78401626G>C | c.297C>G | p.Cys99Trp | missense | EF-1 | 0.001 | C | C | D | D | D | D | 27 | [12,14] |
| 802 | NSHL | Turkish | 78398237A>G | c.386T>C | p.Ile123Thr | missense | EF-2 | 0 | C | C | - | - | - | - | - | [12] |
| JS | NSHL | Hispanic | 78397661G>A | c.556C>T | p.Arg186Trp | missense | 0.005 | C | C | D | D | D | D | 35 | [13] | |
Nucleotide numbering: the A of the ATG translation initiation site is noted as +1 using transcript NM_006383 of CIB2. NSHL, non-syndromic hearing loss; USH1, Usher Syndrome Type 1; C, predicted Conserved; D, predicted Damaging or Deleterious; -, data not available; EF, EF-hand; PP2, PolyPhen-2; MT, MutationTaster. Dashes denote mutations outside functional domains. An “*” indicates a founder mutation identified in a total of 56 Pakistani families. Italics indicate previously described variants also identified in this study.