A viral deubiquitylating enzyme targets viral RNA-dependent RNA polymerase and affects viral infectivity.

نویسندگان

  • Mélanie Chenon
  • Laurent Camborde
  • Soizic Cheminant
  • Isabelle Jupin
چکیده

Selective protein degradation via the ubiquitin-proteasome system (UPS) plays an essential role in many major cellular processes, including host-pathogen interactions. We previously reported that the tightly regulated viral RNA-dependent RNA polymerase (RdRp) of the positive-strand RNA virus Turnip yellow mosaic virus (TYMV) is degraded by the UPS in infected cells, a process that affects viral infectivity. Here, we show that the TYMV 98K replication protein can counteract this degradation process thanks to its proteinase domain. In-vitro assays revealed that the recombinant proteinase domain is a functional ovarian tumour (OTU)-like deubiquitylating enzyme (DUB), as is the 98K produced during viral infection. We also demonstrate that 98K mediates in-vivo deubiquitylation of TYMV RdRp protein--its binding partner within replication complexes--leading to its stabilization. Finally, we show that this DUB activity contributes to viral infectivity in plant cells. The identification of viral RdRp as a specific substrate of the viral DUB enzyme thus reveals the intricate interplay between ubiquitylation, deubiquitylation and the interaction between viral proteins in controlling levels of RdRp and viral infectivity.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A viral deubiquitylating enzyme stabilizes viral RNA- dependent RNA polymerase and affects viral infectivity

Thank you for submitting your manuscript on the identification of DUB function in the TYMV protease for consideration by The EMBO Journal. Three referees have now provided their comments, which are copied below. As you will see, the referees appreciate that your study (for the most part convincingly) establishes TYMV 98K as a bona fide new example of a viral DUB enzyme, although a few open ques...

متن کامل

Effect of Temperature on Symptoms Expression and Viral RNA Accumulation in Groundnut Bud Necrosis Virus Infected Vigna unguiculata

Background: Groundnut bud necrosis virus (GBNV) (Tospovirus genus, Bunyaviridae family) infects the major crops of solanaceae, leguminosae and cucurbitaceae in India. Temperature is an important factor which influences the plant growth and development under diseased conditions.Objective: In the present study, we evaluated the effect of four different temp...

متن کامل

Investigating the Mechanism of Action of SARS-CoV-2 Virus for Drug Designing: A Review

Coronavirus Disease 2019 (COVID-19) is a viral pneumonia emerged in December 2019 in Wuhan, China. Its cause is a new virus from the coronavirus family scientifically named Coronavirus Acute Respiratory Syndrome 2 (SARS-CoV-2). In this review study, articles published in English until March 23, 2020 on new coronavirus infection were reviewed. These articles are obtained by searching in PubMed, ...

متن کامل

The effect of temperature on the binding affinity of Remdesivir and RdRp enzyme of SARS-COV-2 virus using steered molecular dynamics simulation

The fatal SARS-COV-2 virus appeared in China at the end of 2019 for the first time. This virus has similar sequence with SARS-COV in 2002, but its infection is very high rate. On the other hand, SARS-COV-2 is a RNA virus and requires RNA-dependent RNA polymerase (RdRp) to transcribe its viral genome. Due to the availability of the active site of this enzyme, an effective treatment is targeting ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • The EMBO journal

دوره 31 3  شماره 

صفحات  -

تاریخ انتشار 2012