Structural and functional characterization of the triticale (x Triticosecale Wittm.) phytocystatin TrcC-8 and its dimerization-dependent inhibitory activity.
PBN-AR
Instytucja
Instytut Biochemii i Biofizyki Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Phytochemistry (35pkt w roku publikacji)
ISSN
0031-9422
EISSN
1873-3700
Wydawca
Elsevier Limited
DOI
Rok publikacji
2017
Numer zeszytu
brak
Strony od-do
1-10
Numer tomu
142
Liczba arkuszy
Słowa kluczowe
EN
Triticale (x Triticosecale);
Poaceae;
Cysteine proteinase inhibitor;
Inhibitory activity regulation;
Dimerization;
Papain;
Protein modelling
Streszczenia
Język
EN
Treść
Phytocystatins are a group of proteins with significant potential to regulate activities of cysteine proteinases of native and pest/pathogen origins. The two-domain triticale (x Triticosecale Wittm.) phytocystatin TrcC-8 was characterized in this study. This protein belongs to the second group of phytocystatins and contains all the conserved sequences and motifs as well as both N-terminal (CY) and C-terminal (CY-L) domains that are characteristic of phytocystatins with the C-terminal extension. We demonstrated that TrcC-8 forms stable dimers with a significantly reduced inhibitory activity against papain compared to the activity of monomers, indicating the regulatory nature of the oligomerization. Moreover, according to our research, only the N-terminal domain possesses the ability to form dimers, indicating that this part of TrcC-8 is involved in the dimerization of the full-length protein. Homology modelling of TrcC-8 strongly suggests distinct specificities for the CY and CY-L domains, confirmed in experiments with inhibition of the papain. Our results suggest that the CY domain of TrcC-8 may, although markedly weakly and suboptimally, interact with papain in an analogous mode to tarocystatin, while the CY-L domain of TrcC-8 has distinct specificity than tarocystatin.
Inne
System-identifier
PX-599d571fd5defcb1cbbcf272
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