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单词 exoenzyme
释义

exoenzymen.

/ˈɛksəʊˌɛnzʌɪm/
Forms: Also exo-enzyme.
Etymology: < exo- prefix + enzyme n.
Biochemistry.
1. An enzyme which is secreted or acts extracellularly.
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the world > life > biology > biological processes > genetic activity > genetic components > [noun] > nucleic acid > enzymes
galactase1898
cellulase1901
nuclease1902
xanthine oxidase1905
exoenzyme1908
glucosidase1909
galactase1910
nucleosidase1911
nucleotidase1911
adenosine deaminase1913
cellobiase1919
hydratase1922
activase1928
hexokinase1930
histaminase1930
kallikrein1930
Michaelis constant1930
cholinesterase1932
phosphodiesterase1932
chymotrypsin1933
glycosidase1933
rhodanese1933
acetylcholinesterase1937
prolidase1937
diaphorase1938
aconitase1939
hyaluronidase1940
transaminase1940
hydrase1943
isomerase1943
lactoperoxidase1943
streptokinase1944
pectinesterase1945
pectinmethylesterase1945
phosphokinase1946
alliinase1947
CoA1947
phosphotransferase1948
polymerase1948
transferase1948
elastase1949
amyloglucosidase1950
transacetylase1950
transhydrogenase1952
hydroxylase1953
kinase1953
transketolase1953
synthase1954
hexosaminidase1955
translocase1957
angiotensinase1958
angiotensin converting enzyme1960
photoenzyme1960
acetyltransferase1961
adenyl cyclase1961
adenylate cyclase1962
replicase1962
ADA1963
transcriptase1963
adenylyl cyclase1964
recombinase1964
laminarinase1966
nickase1967
acrosin1970
reverse transcriptase1970
cellobiohydrolase1972
cyclooxygenase1974
laminaranase1974
primase1977
helicase1978
monodeiodinase1978
transposase1979
maturase1980
1908 H. M. Vernon Intracellular Enzymes 1 Exo-enzymes..are found in many of the secretions of living organisms.
1926 Waksman & Davison Enzymes ii. 14 In the case of animals the free (exo) enzymes are formed and secreted by special organs (glands).
1942 Adv. Enzymol. 2 244 The conventional view is that an exo-enzyme brings about hydrolysis of the cellulose molecule with consequent liberation of glucose, which is subsequently dissimilated intercellularly.
1976 Ann. Rev. Microbiol. 30 42 Many exoenzymes appear to be subject to control by end product inhibition and catabolite repression.
1984 E. Holtzman & A. B. Novikoff Cells & Organelles (ed. 3) iii. ii. 330 Bacteria also produce exoenzymes that are secreted to the extracellular environment or into the periplasmic space of Gram-negative forms.
2. An enzyme that acts on the ends of a substrate molecule.
ΘΚΠ
the world > life > biology > biological processes > genetic activity > genetic components > [noun] > nucleic acid > enzymes > deficiency of
exoenzyme1955
ADA deficiency1972
1955 Jrnl. Biol. Chem. 213 244 These data showed that the glucuronidase is an ‘exo’ enzyme and does not hydrolyze internal linkages.
1958 M. Dixon & E. C. Webb Enzymes v. 228 The endo- and exo-enzymes co-operate very effectively in protein digestion, in which it may be said that the main function of the former is to produce a large number of free ends at which the latter can act.
1972 D. A. Roberts & C. W. Boothroyd Fund. Plant Pathol. vii. 121 The chain-splitting pectolytic enzymes, whether hydrolytic or transeliminative, may occur as endoenzymes or exoenzymes.
1982 T. M. Devlin Textbk. Biochem. xxiv. 1159 Most of the surface oligosaccharidases are exoenzymes which clip off one monosaccharide at a time from the nonreducing end.
This entry has not yet been fully updated (first published 1993; most recently modified version published online December 2020).
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n.1908
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