Journal article
Alpha-2-macroglobulin-like protease inhibitor from the egg white of cuban crocodile (Crocodylus rhombifer)
Journal of biochemistry (Tokyo), Vol.93(1), pp.121-127
01/1983
DOI: 10.1093/oxfordjournals.jbchem.a134145
PMID: 6188750
Abstract
A high molecular weight protease inhibitor was purified from the egg white of Cuban crocodile (Crocodylus rhombifer). It inhibited the casein hydrolyzing activity of trypsin, subtilisin and papain. Its native molecular weight was 730,000 and it consisted of four subunits of equal molecular weight, each pair of which were disulfide bonded. The amino acid composition, circular dichroic spectrum and electron micrographs of this protein are also presented. Upon incubation with trypsin this protein yielded a fragment of Mr = 80,000, similar in size to the one known to originate from alpha 2-macroglobulin under the same conditions. The molecular parameters of this protein and the broad inhibitory activity towards thiol and serine proteases with different substrate specificities suggest that it is a protein closely related to alpha 2-macroglobulin in mammalian serum. From its native molecular weight and amino acid composition we believe that this protein is also a reptilian counterpart of the avian ovomacroglobulin described by Miller and Feeney (3).
Details
- Title: Subtitle
- Alpha-2-macroglobulin-like protease inhibitor from the egg white of cuban crocodile (Crocodylus rhombifer)
- Creators
- A IkaiT KitamotoM Nishigai
- Resource Type
- Journal article
- Publication Details
- Journal of biochemistry (Tokyo), Vol.93(1), pp.121-127
- Publisher
- England
- DOI
- 10.1093/oxfordjournals.jbchem.a134145
- PMID
- 6188750
- ISSN
- 0021-924X
- eISSN
- 1756-2651
- Language
- English
- Date published
- 01/1983
- Academic Unit
- Iowa Neuroscience Institute; Anesthesia; Neuroscience and Pharmacology
- Record Identifier
- 9984006404702771
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