Amino-acid sequence of a cooperative, dimeric myoglobin from the gastropod mollusc, Buccinum undatum L.
The complete amino-acid sequence of a dimeric myoglobin from the radular mussel of the gastropod mollusc, Buccinum undatum L. has been determined. The globin, which shows cooperative binding of oxygen, contains 146 amino acids, is N-terminal aminoacetylated, and has histidine residues at position 65 and 97, corresponding to the heme-binding histidines seen in mammalian myoglobins. It shows about 75% and 50% homology, respectively, with the dimeric molluscan myoglobins from Busycon canaliculatum and Cerithidea rhizophorarum, the former of which also shows weak cooperatively, but much less similarity to other species of myoglobin and hemoglobin.
Wen
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Department of Chemistry, Boston University, MA 02215.
Laursen
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D000595:Amino Acid Sequence; D000818:Animals; D008969:Molecular Sequence Data; D008974:Mollusca / Q000737:chemistry*; D009211:Myoglobin / Q000737:chemistry* / Q000302:isolation & purification; D017386:Sequence Homology, Amino Acid
D009211:Myoglobin