Table 2. Probands, CHARGE major diagnostic features, gene variants, and pathogenicity evidence.
Proband | CHARGE Major Criteria | Gene | Genomic Position |
cDNA variant | Protein alteration | CADD Score |
GERP Score |
Inheritance | Status | |||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Coloboma | Choanal atresia or cleft palate |
Abnormal external, middle or inner ears |
Pathogenic CHD7 variant |
|||||||||
502 | + | + | + | + | CHD7 | chr8: 61,761,664 | c.5355G>A | p.Trp1785* | 48 | 5.87 | de novo | known |
503 | + | + | - | + | CHD7 | chr8: 61,655,332 | c.1342_1343delAG | p.Arg448Glufs*126 | N/A | 5.539 | de novo | novel |
504 | + | + | + | + | CHD7 | chr8: 61,754,595 | c.4835delA | p.Asn1612Ilefs*28 | N/A | 3.85 | unknown | novel |
505 | + | + | + | + | CHD7 | chr8: 61,773,655 | c.7802dupA | p.Tyr2601* | N/A | 5.73 | de novo | novela |
506 | + | - | + | + | CHD7 | chr8: 61,736,406 | c.3209delT | p.Val1070Glyfs*2 | N/A | 5.69 | de novo | novela |
507 | + | + | - | + | CHD7 | chr8: 61,742,962 | c.3606_3616dupAGAAACTATTA | p.Ile1206Lysfs*9 | N/A | 5.47 | de novo | novela |
508 | + | + | + | + | CHD7 | chr8: 61,757,970 | c.5210+2T>C | 22.6 | 5.48 | de novo | novelb | |
509 | + | - | - | + | CHD7 | chr8: 61,714,150 | c.2440C>T | p.Gln814* | 44 | 6.17 | inherited | known |
510 | + | + | + | + | CHD7 | chr8: 61,750,761 | c.4480C>T | p.Arg1494* | 48 | 4.42 | unknown | known |
511 | + | - | - | + | CHD7 | chr8: 61,763,056 | c.5409T>G | p.Tyr1803* | 49 | -1.18 | de novo | novel |
512 | + | - | + | + | CHD7 | chr8: 61,654,916 | c.925C>T | p.Gln309* | 40 | 5.56 | unknown | known |
513 | + | + | + | + | CHD7 | chr8: 61,765,241 | c.6079C>T | p.Arg2027* | 49 | 3.64 | de novo | known |
514 | + | - | + | + | CHD7 | chr8: 61,734,662 | c.2915A>G | p.Gln972Arg | 24.7 | 5.53 | de novo | novel |
515 | + | + | + | + | CHD7 | chr8: 61,736,402 | c.3205C>T | p.Arg1069* | 45 | 5.69 | de novo | known |
516 | + | + | + | + | CHD7 | chr8: 61,735,210 | c.3106C>T | p.Arg1036* | 45 | 5.53 | de novo | known |
517 | + | + | + | - | RERE | chr1: 8,418,276 | c.4313_4318dupTCCACC | p.Leu1438_His1439dup | N/A | 5.61 | de novo | known |
518 | + | - | + | - | KMT2D | chr12: 49,431,536 | c.9602dupT | p.Ser3202Glufs*13 | N/A | -0.809 | unknown | novel |
519 | + | + | + | - | KDM6A | chrX: 44,820,553 | c.250A>G | p.Ile84Val | 17.16 | 5.66 | X-linked recessive | novel |
520 | - | + | + | - | EP300 | chr22: 41,553,171 | c.3262-2A>G | 24.4 | 5.7 | de novo | novel | |
521 | + | - | - | - | PUF60 | chr8:144,900,664 | c.389G>A | p.Arg130His | 25.9 | 5.18 | de novo | novel |
Known or novel status of CHD7 variants were defined according to presence in the CHD7 database at molgenis51.gcc.rug.nl on June 29, 2017. Known CHD7 variants were also observed in 1000 Genomes with an association to CHARGE syndrome by the Human Gene Mutation Database or ClinVar. Abbreviations are as follows: known, identified in database and defined as pathogenic;
novel, known frameshifts observed at this protein position and defined as pathogenic;
novel, a splice site mutation is observed one nucleotide away at c.5210+3A>G and defined as pathogenic; N/A, not applicable.