title: SAXS Analysis and Characterization of Anticancer Activity of PNP-UDP Family Protein from Putranjiva roxburghii
creator: Verma , Preeti
creator: Varshney, Ritu 
creator: Yadav , Shiv Pratap Singh 
creator: Kar ,  Bibekananda 
creator: Roy, Partha 
creator: Sharma , Ashwani K 
subject: QR Microbiology
description: A class of plant defense and storage proteins, including Putranjiva roxburghii PNP protein (PRpnp), belongs to PNP-UDP family. The PRpnp and related plant proteins contain a disrupted PNP-UDP domain as revealed in previous studies. In PRpnp, the insert disrupting the domain contains the trypsin inhibitory site. In the present work, we analyzed native PRpnp (nPRpnp) complex formation with trypsin and inosine using SAXS experiments and established its dual functionality. Results indicated a relatively compact nPRpnp:Inosine structure, whereas trypsin complex showed conformational changes/flexibility. nPRpnp also exhibited a strong anti-cancer activity toward breast cancer (MCF-7), prostate cancer (DU-145) and hepatocellular carcinoma (HepG2) cell lines. MCF-7 and DU-145 were more sensitive to nPRpnp treatment as compared to HepG2. However, nPRpnp treatment showed no effect on the viability of HEK293 cells indicating that nPRpnp is specific for targeting the viability of only cancer cells. Further, acridine orange, DAPI and DNA fragmentation studies showed that cytotoxic effect of nPRpnp is mediated through induction of apoptosis as evident from the apoptosis-associated morphological changes and nuclear fragmentation observed after PRpnp treatment of cancer cells. These results suggest that PRpnp has the potential to be used as an anticancer agent. This is first report of anticancer activity as well as SAXS-based analysis for a PNP enzyme with trypsin inhibitory activity
publisher: Springer 
date: 2022-06-08
type: Article
type: PeerReviewed
relation: https://link.springer.com/article/10.1007/s10930-022-10060-x
identifier:   Verma , Preeti and Varshney, Ritu  and Yadav , Shiv Pratap Singh  and Kar , Bibekananda  and Roy, Partha  and Sharma , Ashwani K   (2022) SAXS Analysis and Characterization of Anticancer Activity of PNP-UDP Family Protein from Putranjiva roxburghii.  Protein Journal, 41.  pp. 381-393.      
relation: http://crdd.osdd.net/open/3004/