Characterizations of the human parainfluenza type 2 virus gene encoding the L protein and the intergenic sequences

We cloned and determined the nucleotide sequences of cDNAs against genomic RNA encoding the L protein of human parainfluenza type 2 virus (PIV-2). The L gene is 6904 nucleotides long including the intergenic region at the HN-L junction and putative negative strand leader RNA, almost all of which is...

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Bibliographic Details
Published in:Nucleic acids research 1991-05, Vol.19 (10), p.2739-2746
Main Authors: KAWANO, M, OKAMOTO, K, BANDO, H, KONDO, K, TSURUDOME, M, KOMADA, H, NISHIO, M, ITO, Y
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Base Sequence
Biological and medical sciences
Cloning, Molecular
DNA, Viral
Fundamental and applied biological sciences. Psychology
genes
Genes, Viral
Genes. Genome
Introns
L protein
Measles virus
Molecular and cellular biology
Molecular genetics
Molecular Sequence Data
Newcastle disease virus
Parainfluenza Virus 2, Human - genetics
Phylogeny
Sendai virus
Sequence Alignment
Viral Proteins - genetics
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Summary:We cloned and determined the nucleotide sequences of cDNAs against genomic RNA encoding the L protein of human parainfluenza type 2 virus (PIV-2). The L gene is 6904 nucleotides long including the intergenic region at the HN-L junction and putative negative strand leader RNA, almost all of which is complementary to the positive strand leader RNA of PIV-2. The deduced L protein contains 2262 amino acids with a calculated molecular weight of 256,366. The L protein of PIV-2 shows 39.9, 28.9, 27.8 and 28.3% homologies with Newcastle disease virus (NDV), Sendai virus (SV), parainfluenza type 3 virus (PIV-3) and measles virus (MV), respectively. Although sequence data on other components of transcriptive complex, NP and P, suggested a closer relationship between PIV-2 and MV, as concerns the L protein, MV is closely related to another group as SV and PIV-3. From analysis of the alignment of the five l proteins, six blocks composed of conserved amino acids were found in the L proteins. The L protein of PIV-2 was detected in purified virions and virus-infected cells using antiserum directed against an oligopeptide corresponding to the amino terminal region. Primer extension analyses showed that the intergenic regions at the NP-P, P-M, M-F, F-HN and HN-L junctions are 4, 45, 28, 8 and 42 nucleotides long, respectively, indicating that the intergenic regions exhibit no conservation of length and sequence. Furthermore, the starting and ending sequences of paramyxoviruses were summarized.
ISSN:0305-1048
1362-4962
DOI:10.1093/nar/19.10.2739