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STRUCTURAL STUDIES ON THE PHOTORECEPTOR PHYTOCHROME: REEVALUATION OF THE EPITOPE FOR MONOCLONAL ANTIBODY Z‐3B1
Author(s) -
Bonenberger J.,
Schendel R.,
SchneiderPoetsch H. A. W.,
Rüdiger W.
Publication year - 1992
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1992.tb02226.x
Subject(s) - epitope , phytochrome , monoclonal antibody , fusion protein , linear epitope , biology , sequence (biology) , western blot , peptide sequence , antibody , microbiology and biotechnology , chemistry , botany , biochemistry , genetics , recombinant dna , gene , red light
Abstract— The photoreceptor phytochrome is widely distributed in the plant kingdom from angiosperms to ferns, mosses and algae. The epitope for the monoclonal antibody Z‐3B1 which exhibits wide‐ranging cross‐reactivity with phytochromes from higher and lower plants was mapped by the combination of several methods: by Western blot with proteolytic fragments of known localization, by sequence comparison of phytochromes from various plants, and by production of overlapping fusion proteins. The only sequence which is common to all positively‐reacting fusion proteins is the sequence A‐830 to R‐859. This sequence must contain the Z‐3B1 epitope. The best candidate is suggested to be the T‐cell antigenic sequence K‐Y‐ V/I‐E‐A/C‐L‐L‐T (=K‐848 to T‐855). The significance of the highly conserved epitope in all phytochromes is discussed.