Wyszukiwarka
Active Site Architecture and Reaction Mechanism Determination of Cold Adapted beta-D-galactosidase from Arthrobacter sp. 32cB
Abstrakt
ArthbetaDG is a dimeric, cold-adapted beta-D-galactosidase that exhibits high hydrolytic and transglycosylation activity. A series of crystal structures of its wild form, as well as its ArthbetaDG_E441Q mutein complexes with ligands were obtained in order to describe the mode of its action. The ArthbetaDG_E441Q mutein is an inactive form of the enzyme designed to enable observation of enzyme interaction with its substrate. The resulting three-dimensional structures of complexes: ArthbetaDG_E441Q/LACs and ArthbetaDG/IPTG (ligand bound in shallow mode) and structures of complexes ArthbetaDG_E441Q/LACd, ArthbetaDG/ONPG (ligands bound in deep mode), and galactose ArthbetaDG/GAL and their analysis enabled structural characterization of the hydrolysis reaction mechanism. Furthermore, comparative analysis with mesophilic analogs revealed the most striking differences in catalysis mechanisms. The key role in substrate transfer from shallow to deep binding mode involves rotation of the F581 side chain. It is worth noting that the 10-aa loop restricting access to the active site in mesophilic GH2 betaDGs, in ArthbetaDG is moved outward. This facilitates access of substrate to active site. Such a permanent exposure of the entrance to the active site may be a key factor for improved turnover rate of the cold adapted enzyme and thus a structural feature related to its cold adaptation.
Cytowania
-
7
CrossRef
-
0
Web of Science
-
1 4
Scopus
Autorzy (5)
-
Maria Rutkiewicz dr inż.
-
Anna Bujacz
-
Anna Wierzbicka-Woś
Cytuj jako
Pełna treść
- Wersja publikacji
- Accepted albo Published Version
- Licencja
-
otwiera się w nowej karcie
Słowa kluczowe
Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuły w czasopismach
- Opublikowano w:
-
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
nr 20,
strony 1 - 17,
ISSN: 1661-6596 - Język:
- angielski
- Rok wydania:
- 2019
- Opis bibliograficzny:
- Rutkiewicz M., Bujacz A., Wanarska M., Wierzbicka-Woś A., Cieśliński H.: Active Site Architecture and Reaction Mechanism Determination of Cold Adapted beta-D-galactosidase from Arthrobacter sp. 32cB// INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES -Vol. 20,iss. 17 (2019), s.1-17
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.3390/ijms20174301
- Weryfikacja:
- Politechnika Gdańska
Powiązane datasety
- dane badawcze ArchBGal32cB 441Glu mutein gene analysis dataset
wyświetlono 164 razy
Publikacje, które mogą cię zainteresować
Mapping the Transglycosylation Relevant Sites of Cold-Adapted β-D-Galactosidase from Arthrobacter sp. 32cB
- M. Rutkiewicz,
- M. Wanarska,
- A. Bujacz
Structural studies of a cold-adapted dimeric Beta-D-galactosidase from Paracoccus sp. 32d
- M. Rutkiewicz-krotewicz,
- A. Pietrzyk-Brzezińska,
- B. Sekuła
- + 4 autorów
Crystal structures of aminotransferases Aro8 and Aro9 from Candida albicans and structural insights into their properties
- A. Kiliszek,
- W. Rypniewski,
- K. Rząd
- + 2 autorów
A novel cold-active beta-D-galactosidase from the Paracoccus sp. 32d - gene cloning, purification and characterization
- A. Wierzbicka-Woś,
- H. Cieśliński,
- M. Wanarska
- + 3 autorów