Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression

Nipah virus has been identified as the causative agent responsible for an outbreak of fatal human viral encephalitis in Malaysia and Singapore in 1998 to 1999. In vitro replication assays with Nipah virus minigenome carrying CAT gene (chloramphenicol acetyltransferase) has been developed without the...

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Main Authors:	Poh, Lian-Yih, Zulkeflie Zamrod, Amir Rabu
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2011
Online Access:	http://journalarticle.ukm.my/2724/ http://journalarticle.ukm.my/2724/ http://journalarticle.ukm.my/2724/1/11_Lian-Yih_Pong.pdf

id	ukm-2724
recordtype	eprints
spelling	ukm-27242016-12-14T06:32:28Z http://journalarticle.ukm.my/2724/ Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression Poh, Lian-Yih Zulkeflie Zamrod, Amir Rabu, Nipah virus has been identified as the causative agent responsible for an outbreak of fatal human viral encephalitis in Malaysia and Singapore in 1998 to 1999. In vitro replication assays with Nipah virus minigenome carrying CAT gene (chloramphenicol acetyltransferase) has been developed without the use of infectious virus to allow further study of the replication of Nipah virus in vitro. It has been reported that the viral RNA replication and transcription activity of paramyxoviruses are controlled by essential sequences located in the terminal regions of viral genomic and antigenomic RNAs. In this study, single base substitution was carried out on the Nipah virus minigenome separately at the three guanine residues (G) located in positions 79, 85 and 91 of the leader promoter within the 5’ non-translated region (NTR) of the nucleocapsid gene (N) mRNA region. The guanine residues of these positions were substituted with the cytosine (C) or adenine (A) residue, respectively by using the overlapping PCR-mediated mutagenesis method. The resultant mutants containing the desired point mutation were confirmed by sequencing. The mutants were analyzed to determine the effect of substitution mutation on the viral transcription activity of the minigenome. It was found that the substitution of G at positions 79 and 85 decreased the efficiency of transcription of Nipah virus minigenome while the substitution of G at position 91 did not. Our findings also showed that the effect of transition mutation gave more impact than the transversion mutation in term of suppression effect upon the transcription activity of minigenome. Universiti Kebangsaan Malaysia 2011-10 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/2724/1/11_Lian-Yih_Pong.pdf Poh, Lian-Yih and Zulkeflie Zamrod, and Amir Rabu, (2011) Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression. Sains Malaysiana, 40 (10). pp. 1139-1146. ISSN 0126-6039 http://www.ukm.my/jsm
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Nipah virus has been identified as the causative agent responsible for an outbreak of fatal human viral encephalitis in Malaysia and Singapore in 1998 to 1999. In vitro replication assays with Nipah virus minigenome carrying CAT gene (chloramphenicol acetyltransferase) has been developed without the use of infectious virus to allow further study of the replication of Nipah virus in vitro. It has been reported that the viral RNA replication and transcription activity of paramyxoviruses are controlled by essential sequences located in the terminal regions of viral genomic and antigenomic RNAs. In this study, single base substitution was carried out on the Nipah virus minigenome separately at the three guanine residues (G) located in positions 79, 85 and 91 of the leader promoter within the 5’ non-translated region (NTR) of the nucleocapsid gene (N) mRNA region. The guanine residues of these positions were substituted with the cytosine (C) or adenine (A) residue, respectively by using the overlapping PCR-mediated mutagenesis method. The resultant mutants containing the desired point mutation were confirmed by sequencing. The mutants were analyzed to determine the effect of substitution mutation on the viral transcription activity of the minigenome. It was found that the substitution of G at positions 79 and 85 decreased the efficiency of transcription of Nipah virus minigenome while the substitution of G at position 91 did not. Our findings also showed that the effect of transition mutation gave more impact than the transversion mutation in term of suppression effect upon the transcription activity of minigenome.
format	Article
author	Poh, Lian-Yih Zulkeflie Zamrod, Amir Rabu,
spellingShingle	Poh, Lian-Yih Zulkeflie Zamrod, Amir Rabu, Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression
author_facet	Poh, Lian-Yih Zulkeflie Zamrod, Amir Rabu,
author_sort	Poh, Lian-Yih
title	Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression
title_short	Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression
title_full	Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression
title_fullStr	Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression
title_full_unstemmed	Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression
title_sort	effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression
publisher	Universiti Kebangsaan Malaysia
publishDate	2011
url	http://journalarticle.ukm.my/2724/ http://journalarticle.ukm.my/2724/ http://journalarticle.ukm.my/2724/1/11_Lian-Yih_Pong.pdf
first_indexed	2023-09-18T19:36:49Z
last_indexed	2023-09-18T19:36:49Z
_version_	1777405326273806336

Effects of point mutations at positions 79, 85 and 91 of the nipah virus leader sequence to its minigenome expression

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