Pregled bibliografske jedinice broj: 805209
Naturally Occurring Isoleucyl-tRNA Synthetase without tRNA-dependent Pre-transfer Editing
Naturally Occurring Isoleucyl-tRNA Synthetase without tRNA-dependent Pre-transfer Editing // The Journal of biological chemistry, 291 (2016), 8618-8631 doi:10.1074/jbc.M115.698225 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 805209 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Naturally Occurring Isoleucyl-tRNA Synthetase without tRNA-dependent Pre-transfer Editing
Autori
Cvetesic, Nevena ; Dulic, Morana ; Bilus, Mirna ; Sostaric, Nikolina ; Lenhard, Boris ; Gruic- Sovulj, Ita
Izvornik
The Journal of biological chemistry (0021-9258) 291
(2016);
8618-8631
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
isoleucyl-tRNA synthetase ; pre-transfer editing ; proofreading ; eukaryotes ; mupirocin
Sažetak
Isoleucyl-tRNA synthetase (IleRS) is unusual among aminoacyl-tRNA synthetases in having a tRNA-dependent pre-transfer editing activity. Alongside the typical bacterial IleRS (such as Escherichia coli IleRS), some bacteria also have the enzymes (eukaryote-like) that cluster with eukaryotic IleRSs and exhibit low sensitivity to the antibiotic mupirocin. Our phylogenetic analysis suggests that the ileS1 and ileS2 genes of contemporary bacteria are the descendants of genes that might have arisen by an ancient duplication event before the separation of bacteria and archaea.We present the analysis of evolutionary constraints of the synthetic and editing reactions in eukaryotic/eukaryotelike IleRSs, which share a common origin but diverged through adaptation to different cell environments. The enzyme from the yeast cytosol exhibits tRNA-dependent pre- transfer editing analogous to E. coli IleRS. This argues for the presence of this proofreading in the common ancestor of both IleRS types and an ancient origin of the synthetic site-based quality control step. Yet surprisingly, the eukaryote-like enzyme from Streptomyces griseus IleRS lacks this capacity ; at the same time, its synthetic site displays the 103 -fold drop in sensitivity to antibiotic mupirocin relative to the yeast enzyme. The discovery that pre-transfer editing is optional in IleRSs lends support to the notion that the conserved post-transfer editing domain is the main checkpoint in these enzymes. We substantiated this by showing that under error- prone conditions S.-griseus IleRS is able to rescue the growth of an E. coli lacking functional IleRS, providing the first evidence that tRNA-dependent pre-transfer editing in IleRS is not essential for cell.
Izvorni jezik
Engleski
Znanstvena područja
Kemija, Biologija
POVEZANOST RADA
Projekti:
HRZZ-IS-09.01/293 - Nekanonske uloge aminoacil-tRNA-sintetaza
HRZZ-UKF 8/15 - The origin of amino acid specificity in editing class I aminoacyl-tRNA synthetases and cellular requirements for proofreading (Gruić-Sovulj, Ita, HRZZ ) ( CroRIS)
Ustanove:
Prirodoslovno-matematički fakultet, Zagreb
Profili:
Boris Lenhard
(autor)
Ita Gruić-Sovulj
(autor)
Morana Dulić
(autor)
Nevena Cvetešić
(autor)
Mirna Biluš
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
- MEDLINE
- Nature Index