Table 3. Comparison of the characteristics of purified chitinase from other reported Enterobacter sp.

Species

Chitinase

Mol. wt.
(kDa)

Optimum
pH

Optimum
temp. (ºC)

Substrate

Hydrolysis
product/s

Inhibitors

Reference

Enterobacter sp. NRG4

Endochitinase

60

5.5

45

Swollen chitin

(GlcNAc)(GlcNAc)₂

Cu²⁺, Co²⁺, Ag⁺, Hg²⁺, NBS, DTNB, iodoacetamide

Present study

Enterobacter sp. G-1

Endochitinase

60

7.0

40

Colloidal chitin

(GlcNAc)₂

(GlcNAc)₃ (GlcNAc)₄

EDTA, PCMB

Park et al. 1992

Enterobacter aerogenes

N.D.

42.5

6.0

55

-

-

Hg²⁺, Co²⁺ Mg²⁺

Tang et al. 2001

Enterobacter agglomerans

Endochitinase

61

6.5

40

pNP-(GlcNAc)₃

pNP

-

Chernin et al. 1997