Abstract
Putrescine and cadaverine are essential constituents of the peptidoglycan of Veillonella alcalescens, Veillonella parvula, and Selenomonas ruminantium and are necessary for the growth of these organisms (Y. Kamio and K. Nakamura, J. Bacteriol. 169:2881-2884, 1987, and Y. Kamio, H. Pösö, Y. Terawaki, and L. Paulin, J. Biol. Chem. 261:6585-6589, 1986). In this study, the structural specificity of the diamine requirement for normal cell growth of these bacteria was examined by using a series of diamines with a general structure of NH3+ X (CH2)n X NH3+. Diaminohexane (n = 6) which was incorporated into the peptidoglycan was as effective as putrescine (n = 4) and cadaverine (n = 5) for normal cell growth. However, diaminopropane (n = 3) and diaminoheptane (n = 7) were less effective for growth than diaminohexane, although they were incorporated into the peptidoglycan to the same extent.
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