Conserved N-terminal sequences in the flagellins of archaebacteria.

Abstract:

:Methanococcus voltae produces two flagellins of molecular weight 31,000 and 33,000. Amino acid analysis as well as peptide mapping with cyanogen bromide, chymotrypsin and Staphylococcus aureus V-8 protease indicates that the two flagellins are distinct. N-terminal sequencing of the 31,000 Mc. voltae flagellin as well as the 24,000 and 25,000 molecular weight flagellins of Methanospirillum hungatei GP1 shows an extensive homology with the reported N-terminus of the flagellins from Halobacterium halobium, deduced from the nucleotide sequence of the cloned genes. However, the N-termini of all three sequenced methanogen flagellins lack a terminal methionine and start at position 13 from the N-terminus of H. halobium flagellins. This initial 12 amino acid stretch may be a leader peptide which is subsequently cleaved to generate the mature flagellin, which could suggest flagellar assembly in archaebacteria occurs by a mechanism distinct from that in eubacteria. The high degree of conservation of the N-terminus of the flagellins from Mc. voltae, Msp. hungatei and H. halobium suggests an important role for this sequence, and that the archaebacteria share a common mechanism for flagellar biosynthesis.

authors

Kalmokoff ML,Karnauchow TM,Jarrell KF

doi

10.1016/0006-291x(90)91744-d

subject

Has Abstract

pub_date

1990-02-28 00:00:00

pages

154-60

issue

1

eissn

0006-291X

issn

1090-2104

pii

0006-291X(90)91744-D

journal_volume

167

pub_type

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