The resistance of three types of Bacillus cereus T spores to ultraviolet radiation corresponded to their dipicolinic acid (DPA) content. Photoprotection against ultraviolet light was observed in DPA-containing spores and in DPA-less spores irradiated through calcium dipicolinate.

The title compound, (C(3)H(7)N(6))(4)[Ca(C(7)H(3)NO(4))(3)]·6H(2)O or (tataH)(4)[Ca(pydc)(3)]·6H(2)O (where tata is 2,4,6-triamino-1,3,5-triazine and pydcH(2) is pyridine-2,6-dicarboxylic acid), was obtained by reaction of Ca(NO(3))(2)·4H(2)O with the proton-transfer compound (tataH)(2)(pydc) in aqueous solution. The [Ca(pydc)(3)](4-) anion has twofold crystallographic symmetry. It is a nine-co...

When J. Powell (Biochem. J. 54:210, 1953) established dipicolinic acid (DPA) as an important constituent of bacterial spores, microbiologists became concerned about the function this compound serves and about its biosynthetic pathway. It is now generally considered that DPA is involved in the heat resistance of spores, but the mechanism is unknown. A number of schemes have been proposed for its...

Journal of Modern Optics Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713191304 Semiquantitative model for response of biological molecules containing C, N, O and H to laser pulses, with initial application to dipicolinic acid Petra Sauer a; Roland E. Allen a a Institute for Quantum Studies and Physics Depa...

Hodson, Phillip H. (University of Texas, Austin), and J. W. Foster. Dipicolinic acid synthesis in Penicillium citreo-viride. J. Bacteriol. 91:562-569. 1966.-Dipicolinic acid (DPA) accumulation in culture filtrates of the mold Penicillium citreo-viride was studied in surface and submerged cultures. Good DPA yields were obtained in suspensions of washed, submerged mycelium in the presence of a ca...

Spores of wild-type and mutant Bacillus subtilis strains lacking various structural components were exposed to simulated Martian atmospheric and UV irradiation conditions. Spore survival and mutagenesis were strongly dependent on the functionality of all of the structural components, with small acid-soluble spore proteins, coat layers, and dipicolinic acid as key protectants.