Table 2.
Overview of all known cases of MYO15A variations with milder hearing loss phenotype
| Ethnic Origin | References | Zygosity | cDNA (NM_016239.3) | Protein change (NP_057323.3) | Variant type | Exon/introna | Protein domain | Hearing impairment phenotype | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Age of onset(year) | Severity (PTA) | Type of audiometry | ||||||||
| China | This study | Het | c.4666G > A | p.Ala1556Thr | missense | 15 | Motor | Pretlingual(5) Progressive | Severe /residual hearing of low frequencies | down-sloping |
| c.6177 + 1G > T | Splice site | splicing | 28 | MyTH4 1 | ||||||
| China | This study | Het | c.855dupT | p.Pro286Serfs*15 | frameshift | 2 | N-terminal | Congenital | Severe /residual hearing of low frequencies | down-sloping |
| c.3524dupA | p.Ser1176Valfs*14 | frameshift | 2 | N-terminal | ||||||
| c.7822G > A | p.Asp2608Asn | missense | 41 | Other | ||||||
| Iran | Mehregan,2018 | Hom | c.6436C > T | p.Arg2146Trp | missense | 30 | MyTH4 1 | Pre-lingual | Moderate to severe | down-sloping |
| Korea | Chang, 2018 | Het | c.5504G > A | p.Arg1835His | missense | 22 | Motor | Post-lingual, Progressive | Severe /residual hearing of low frequencies | down-sloping |
| c.10245_10247delCTC | p.Ser3417del | missense | 64 | FERM 2 | ||||||
| Korea | Chang, 2018 | Het | c.9790C > T | p.Gln3264* | nonsense | 60 | FERM 2 | Post-lingual, progressive | Severe /residual hearing of low frequencies | down-sloping |
| c.10263C > G | p.Ile3421Met | missense | 64 | FERM 2 | ||||||
| Pakistan | Naz,2017 | Hom | c.3866 + 1G > A | Splice site | splicing | 5 | Motor | NA | Moderate | NA |
| Pakistan | Naz,2017 | Hom | c.8158G > A | p.Asp2720His | missense | 45 | FERM 1 | NA | Moderate | NA |
| China | Li, 2016 | Hom | c.3524dupA | p.Ser1176Valfs*14 | frameshift | 2 | N-terminal | Congenital | Severe/ residual hearing of low frequencies | down-sloping |
| NA | Sloan,2016 | Het | c.7550C > G | p.Thr2517Ser | missense | 39 | Other | Congenital | Mild moderate asymmetric | NA |
| c.8812G > A | p.Gly2938Arg | missense | 51 | SH3 | ||||||
| NA | Sloan,2016 | Het | c.4310A > G | p.Tyr1437Cys | missense | 11 | Motor | Postlingual Childhood | Mild moderate | NA |
| c.10202G > A | p.Arg3401His | missense | 63 | FERM 2 | ||||||
| Iran | Sloan,2015 | NA | c.2759G > A | p.Trp920* | nonsense | 2 | N-terminal | Congenital | Moderate | NA |
| Iran | Sloan,2015 | NA | c.4907_4909delAGG | p.Glu1637del | indel | 17 | Motor | Post-lingual | Severe to profound | NA |
| Iran | Sloan,2015 | NA | c.5810G > A | p.Arg1937His | missense | 24 | IQ | Post-lingual | Severe | NA |
| Iran | Sloan,2015 | NA | c.6437G > A | p.Arg2146Gln | missense | 30 | MyTH4 1 | Postlingual | Severe | NA |
| Iran | Sloan,2015 | NA | c.8467G > A | p.Asp2823Asn | missense | 48 | FERM1 | Congenital | Moderate | NA |
| China | Gu,2015 | Het | c.4322G > T | p.Gly1441Val | missense | 12 | Motor | Congenital | Severe / residual hearing of low frequencies | down-sloping |
| c.4898 T > C | p.Ile1633Thr | missense | 17 | Motor | ||||||
| China | Gu,2015 | Het | c.3892G > A | p.Ala1298Thr | missense | 6 | Motor | Congenital | Severe/ residual hearing of low frequencies | down-sloping |
| c.8450G > A | p.Arg2817His | missense | 47 | FERM1 | ||||||
| Japan | Miyagawa,2015 | Het | c.535G > T | p.Glu179* | nonsense | 2 | N-terminal | Congenital | Moderate | down-sloping |
| c. 9413 T > A | p.Leu3138Gln | missense | 57 | MyTH4 2 | ||||||
| Japan | Miyagawa,2015 | Het | c.5978G > A | p.Arg1993Glu | missense | 27 | Other | Postlingual(8) | Severe/ residual l hearing of low frequencie | down-sloping |
| c. 9517G > A | p. Gly3173Arg | missense | 57 | Other | ||||||
| Japan | Miyagawa,2015 | Het | c.5978G > A | p.Arg1993Glu | missense | 27 | Other | Postlingual(10) | Severe/ residual l hearing of low frequencie | down-sloping |
| c.6487delG | p.Ala2153Profs*100 | frameshift | 30 | MyTH4 1 | ||||||
| Japan | Miyagawa,2015 | Het | c.6703 T > C | p.Ser2235Pro | missense | 32 | Other | Postlingual(12) | Moderate/ residual l hearing of low frequencies | down-sloping |
| c.10263C > G | p.Ile3421Met | missense | 64 | FERM 2 | ||||||
| Japan | Miyagawa,2015 | Het | c. 9413 T > A | p.Leu3138Gln | missense | 57 | MyTH4 2 | Congenital | Profound / residual hearing of low frequencies | down-sloping |
| c.9478C > T | p. Leu3160Phe | missense | 57 | MyTH4 2 | ||||||
| Qatar | Vozzi, 2014 | Hom | c.453_455delCGAinsTGGACGCCTGGTCGGGCAGTGG | p.Glu152Glyfs*81 | frameshift | 2 | N-terminal | Progressive | Profound | flat |
| German | Vona,2014 | Het | c.1137delC | p.Tyr380Metfs*65 | frameshift | 2 | N-terminal | Pre-lingual(3) Progressive | Normal between 0.125 and 0.25 kHz/ steeply sloping to severe HL | down-sloping |
| c.7124_7127delACAG | p.Asp2375Valfs*29 | frameshift | 35 | other | ||||||
| Iran | Fattahi,2012 | Hom | c.5305A > G | p.Thr1769Ala | missense | 20 | Motor | Congenital | Severe to profound /residual hearing of low frequencies | down-sloping |
| Iran | Fattahi,2012 | Hom | c.5925G > A | p.Trp1975* | nonsense | 26 | Other | Congenital | Severe to profound/residual hearing of low frequencies | down-sloping |
| Iran | Fattahi,2012 | Het | c.5419-21delT | p.Phe1807Leu fs*6 | frameshift | 22 | Motor | Congenital | Severe to profound/residual hearing of low frequencies | down-sloping |
| c.1387A > G; | p.Met463Val | missense | 2 | N-terminal | ||||||
| Iran | Fattahi,2012 | Hom | c.8467G > A | p.Asp2823Asn | missense | 48 | FERM1 | Congenital | Severe to profound/residual hearing of low frequencies | down-sloping |
| Iran | Fattahi,2012 | Hom | c.5810G > A | p.Arg1937His | missense | 24 | IQ | Congenital | Severe to profound/residual hearing of low frequencies | down-sloping |
| Iran | Fattahi,2012 | Hom | c.4904-4907delGAG | p.Glu1637del | indel | 17 | Motor | Congenital | Severe to profound/residual hearing of low frequencies | down-sloping |
| Pakistan | Bashir,2012 | Hom | c.1185dupC | p. Glu396Argfs*36 | frameshift | 2 | N-terminal | Congenital | Moderate to severe /residual hearing of low vfrequencies | down-sloping |
| Turkey | Cengiz,2010 | Hom | c.867C > G | p.Tyr289* | nonsense | 2 | N-terminal | Progressive | Moderately severe/residual hearing of low frequencies | down-sloping |
| Iran | Shearer,2009 | Hom | c.6371G > A | p. Arg2124Gln | missense | 30 | MyTH4 1 | NA | Severe /residual hearing of low frequencies | down-sloping |
| Pakistan | Nal,2007 | Hom | c.3334delG | p.Arg1112Valfs*1124 | frameshift | 2 | N-terminal | Congenital | Severe /residual hearing of low frequencies | down-sloping |
a Location of MYO15A splicing variants in introns are shown in italic letters. Abbreviations: NA not available, Hom homozygous variant, Het compound heterozygous variant