免费文献传递   相关文献

Optimization expression of recombinant α-cyclodextrin glucanotransferase and analysis of the products specificity

重组α-环糊精葡萄糖基转移酶表达条件优化及其产物专一性分析



全 文 :!10
"!

#
2012
$

%
€
 
m
 

 
4
 
¿
 
À
ChineseJournalofBioprocessEngineering
Vol.10No.1
Jan.2012
doi:10.3969/j.issn.1672-3678.2012.01.006
OPQI
:2011-07-15
K½¾!

u¦JÐÖMQ§¨LcT
(31171643)
RS.T

QRY
(1987—),
®

ãjÍSÉ

±¡³´€

³´ÍÎ

€m-Mšh4À

uDT

³øÉ
),
ËÌ
,Email:hzzqz@sdu.edu.cn;
U
V

³øÉ
),
ʳ´‘
,Email:chaoyp@sun.im.ac.cn
N9 α \]^_`ÄKabc®dŽ‰
XYbcCü(çg‰n¯
Ž
1,
‘’“
2,
”
 
•
2,
–—˜
1,
™š›
2,
,œ

(1.
žŸK5 ¡¢£ ¡¤56

 ¡
264209;2.
hi356 ¥9:lm¦

§¨
100101)
7
 
h

Ÿ ¡ù
Bacilussp602 1
³α ¢£¤¥¦1¼§¨©(αCGT)¼¸(cgt)ª«èßç¬ÂPQE30Î,­
®•ÐI¯
PQE30/cgt,
/Ƨ¬°±
E.coliM15^ ,
Úè•Ð€
E.coliM15(PQE30/cgt)。

IPTG
³|Œæ
Úè©ßç³à²´µ
:TB
³´¼
,0.01mmol/LIPTG,
|Œeý
16℃,
µ¶©Ê÷6àŠXç
5209U/mL;
·«
IPTG24h^ ,¸
·¹º!w¹»Á¼½¾©¿µyÄÀ

©Á.;|Œß糲´µË¶
TB
³´¼Î¸·Ã
1
30g/L,
¥¦1
12g/L,16℃
³´
96h,
©Ê÷6çè
8635U/mL,
yBŠù
IPTG
|Œ³dÞ

YZ
SDS
PAGE
»Än¾ÅÝÆ

©Ç¬§¬º»ßy

•Ð©§¬IJÄÅË
1%
XÈÉÊ
24h^ ,α ¢£¤(αCD)§
¬ÇXç
382%,αwβ³Ë©ÃÊÌË34∶1,αCDDEôŠ³ÍSì,¸ ÎϕÐαCGT©DEôõ³ä¬
¨¦ÐÑ

ijk
:α ¢£¤¥¦1¼§¨©;PQE30;ßç7«¬
lmnop
:Q812;Q815    
6qrst
:A    
6u;p
:1672-3678(2012)01-0030-07
Optimizationexpressionofrecombinantαcyclodextringlucanotransferase
andproductspecificityanalysis
SONGBinghong1,XUEZhiquan2,ZHONGJian2,ZHUQizhong1,CHAOYapeng2,QIANShijun2
(1.MarineColege,ShandongUniversityatWeihai,Weihai264209,China;
2.InstituteofMicrobiology,ChineseAcademyofSciences,Beijing100101,China)
Abstract:Thegeneofαcyclodextringlucanotransferase(αCGTase)wasamplifiedbycolonyPCRfrom
Bacilussp6021toinsertintoexpressionvectorPQE30,andthenconstructedarecombinantstrain
E.coliM15(PQE30/cgt).TheoptimalconditionsfortheexpressionofαCGTasebytheIPTGinduction
wereasfolows:TBmedium,0.01mmol/LIPTG,16℃,withtheactivityof5209U/mLculture.In
addition,glycineandmannitolwerefoundtobeabletohelpsecretionoftheαCGTase.Theactivityin
anoptimizedautoinducingmedium,inwhichTBmediumcontaining12g/Lglucoseand30g/Llac
tose,achieved8635U/mL.TheenzymecatalytictestsdemonstratedthattheyieldofαCDreached
382% after24hincubationwithanα∶βratioof34∶1.Thus,therecombinantαCGTaseshowedbet
terindustrialperspectiveintheαCDproduction.
Keywords:αcyclodextringlucanotransferase;E.coliM15(PQE30/cgt);expressionandoptimization
  
abcdeDQfgh
(cyclodextringlucano
transferase,

CGT,EC2.4.1.19)
Õα ñ°h¦
Xr`¼Eo‘
[1]。CGT
hY-ñ°€úabc
(cyclodextrins,

CDs),
ÛIdeDiQE?T
Yabcpí αCD(6ô)、βCD(7ô)、γCD
(8
ô

Zó€úQxaEp­
[2],
(
CGT
h:ÛI
€ú^mEù¼øsâpí αCGTh、βCGTh、
γCGTh[3]。
VÜabcp­ûöÑ[çŠæçErÜ]þ²/|

â÷š[C^²p­ùúJŽm

Õ
(TX^²p­Eé-;’
[4],
R"“Ò¦4
l
[5-6]、
îÒ4l
[7]、
-_¦4l
[8]
þ»%öÙÚ
EPv

{"6Š

abc“€mUB

pq-M

yl

æçèé6`a4lrˆö:ÙÚE
*P
[9]。
4l|€^abcÒPE
CGT
hˆ$JÜb
îcZ×

(@Ü αCDE¹ºod*P$hÜ-øbîcZ
(Paenibacilusmacerans)
E
CGT
h
[10]。
(@
CGT
hQREijòC*P
pET
ø,
Eije²
[11]。PQE30
Õo¬=Ñije²

×Ü
PDS
’è¦X
[12],
Õ?fg’è

ûöÃ:,-E
Dã­ ÅÝ]Zm

$JhZ²E
T5
D㭁

ôiDÅÝ­jÇBp
,¸
ï6iDD¹­E/Ž
Õ(D¹
T5
Dã­Eij

ð(öŠEfâ¼
­â÷öŸàtQfrExkÂI©ï‡ij
’èELµ;

@AFP=Ñije²
PQE30
@ab
CGT
h
EQR½ñ]Ÿij©,-ijkl

÷#íab
cExáZ€^ŒµQW

Õ(í7“Ò¦

yl
6-_¦þñlEÙÚ*P2Gl1

1 
vw%xy
1.1 
€vw
1.1.1 
Z_š’è
Bacilussp602 1
8ruÖMNµ€m³´Ò
p±©ï+

’è
pEASYT1Simple,
ím§

’k

vw

’è
PQE30,Qiagen
vw
;E.coliM15、E.coli
DH5α,åmÞÖU‡¾ö“vw。
1.1.2 
ù¼2 
“¹;ÑBamHI、PstI、DNAligationkitver
2.0、dNTP、LATaq
h
,TaKaRa(
x(

vw
;^
‹ö
{Dn§Ÿa2 o

ÙLj±€mÖUö“v
w
;1kbLadder、
’è£22 o

’kå4p‹Ö
Uö“vw

ºqQ β D rtst÷iDè
(IPTG),AMERSCO
vw

âË;ñ°

¿ÅuPñ
°™

v‘Aøˆœ23m
,Oxoid(
vu

vw

7
M2 ˆípq‰

1.1.3 
cåQ
LB
cåQ
(g/L):
‘Aø
10,
ˆœ23m
5,
NaCl5。
`S
E.coli
E[BcåQí
TB
cåQ
(g/L):
‘Aø
12,
ˆœ23m
24;¯
¼
4mL。
SOB
cåQ
(1L):
‘Aø
20g,
ˆœ23m
5g,
NaCl05g;1mol/LKCl25mL,1mol/LMgCl2
10mL。
SOC
cåQ

“
SOB
cåQrÊçZVE
1mol/L
deD
20mL。
M9
de wm§cåQ

>çDE
[13]
—î¹
5×M9
cåQ
(g/L),
»
NH4Cl5、Na2HPO430、
KH2PO415、NaCl25,ÍP&P‚ZçY]£cå
Qõö

ï

þ7rÊ÷À‚Z˕
1mL(1mol/L
MgCl2、10mL’™p?í20%EdeD)。
J[BcåQí“
TB
cåQQW|Êde
DiDV¹<

1.2 
€xy
1.2.1 PCR
xžTEÔ÷
Õ
NCBI
?I-rÈyZ_
Paenibacilusmacer
ans(GenBankAccessionAF0473631)
abαCGTh
QRE^è‹Bp

í
2145bp,
©ÛI"÷QRB

Primer50
\l452m

|z2m

í
CGCGGATCCTCACCCGATACGAGCGTGG(
«ØLp
í
BamHI
h<{v
);
Àz2m

í
AAAACTGCA
GTTAATTTTGCCAGTCCACCG(
«ØLpí
PstI
h
<{v
),
8’k|րmUBö“vwŽú

Y
Bacilussp6021
Z_½ñ•²cå

Z$
PCR

TEÔ÷

ÞDã
PCR
xžkl
:95℃
tX;
5min;
ƽñ
30
ôìa
(94℃ 1min,56℃ 45s,
72℃ 2min);72℃
I}
10min。
^m_
1%
ö{D
n§—~²˜

¶VYTEQRÊ¿€e²
pEASYT1Simple
r

1.2.2 
ije²
PQE30/cgt
E|}
PCR
^m6’è
PQE30
ˆP
BamHI

PstI
&
h<

Y‰-VE
cgt
QRš
PQE30
e²Ü
16℃
(
R

Y(RVE`S’èf-¿x‚cZ
M15
ƒ7
N<=r

PZ$
PCR
\Ví;€

23’è

Æ
Y`S’è&h
˜B3‡`S&½

13 
!

# QRYþ
:`
Sα abcdeDQfghijklE,-67^mno;Epq
1.2.3 
`S‘AαCGTh:E˜µ
PQE30
í=Ñije²

“[Bcå/„V

ab
1mL
c啽ñ<=

±šab|¢ìí¥h
•

™p?í
025%
EâË;ñ°Ë•

…
†

3
04mL
Ü
40℃
ßÝçàr
15min,
ÎÚ2
ÚrÊ
01mL


@çS“h6&—Ê
01mol/LHCl
˕
15mL,
ê

ÈÜ
40℃
ßÝ
çà
10min。
C3Sç
01mol/LHCl
˕
15
mL,
ÆÊ
3mL01mol/LI2•65mL•ôç,
ê

ֆ
700nm
蘵

“|ÜklÀ

Yþp
à·?
10%
yŒÁ҇Eh™µ‡í

ôh:
Šã{

àÀm5áh:

h:ã{
=(A-A1)/A×100×h•õöï?
mr
:A
í@çSEyŒÁ
;A1íC3SEyŒÁ。
1.2.4 
Z²£E˜µ
Z²£PpŒŒ5Ü
600nm
˜µ

©P
OD600ir。
1.2.5 
4ÀZ
EcoliM15(PQE30/cgt)
E\V6

¬­cå

՘–|(3ãZ$

RÊùö
5mLLB
cåQE2Úr½ñ¿ˆcå

fí
220
r/min,
cåݍí
37℃。
[Bcå

Y¿ˆcå%EZ_à
1%
ERª
fR¿õ
5mLTB
‡ˆcåQE2Úr

ÎZ•
OD600í06~08ë,Y2ÚÈÜþ|10min45,
Ê⣍í
001mmol/L
E
IPTG
V÷Y7fó
16℃
ýÎr½ñ?Ý[Bcå
,96h
V˜µh:

1.2.6 SDSPAGE
pq
Åì>çDE
[14]。
7rp±§’™p?í
12%,
£¤§’™p?í
5%,
÷
01%
%Šh)ƒ
R 250
‰^

127 
f-^mE
HPLC
pq
™p?í
1%
Eñ°Ë•

ޅ†

÷
400U/g
E™Ê¥h•
,40℃
f-
24h。
@2«½
ñèé

…†

±š3|¢

P<ûG¿ûV

P
HPLC
½ ñ ² ˜

7 r ^ ¯ ¬ í
HypersilNH2
(250mm×46mm×5μL)、 ãòí V(ƒŠ)∶
V(
ç
)=73∶27、
 í
10mL/min、
²˜B;í
210nm、
¬Ýí
40℃、
½«™í
20uL。
2 
‚ƒ%„)
2.1 
`e@
E.coliM15(PQE30/cgt)
‰f˜
Ö

íQR€ijVEö{Dn§—~Ö

_Z$
PCR
cgt,
ÆÖ
1(a)
Òr

Y7
Ê¿€e²
pEASYT1Simple
r

/æÆÖ
1(b)
Òr

Y`S€e²½ñ˜B

x¿
Blast
pq‡
Â
:GenBank
rEαCGTaseBpö2ô{v‡€ï
X

í
G1849A

G2110A;
!Bpab
687
ô¢Q
‹

7rö

ô¢Q‹ö[º

í
V590M

G677S。
Y&hPQE30
½ñ(R

|
}
PQE30/cgt`
S’è

ÆÖ
1(c)
Òr

1—PCR
xž^m
cgt;2—pEASYT1Simple/cgt
&h
3—pEASYT1Simple
’è
;4—PQE30/cgt
&h
5—PQE30/cgt
’è
;M—DNA
ò@p­’™rs
m
1 
N9ýgEchb
PCR
ó‹‰ijm
Fig.1 DoubledigestionandPCRamplificationof
recombinantplasmid
Ö

íije²
PQE30/cgt
EÖ¯
,`
Se²
EÔ÷J;:í
55×103bp。
Y`S’èf-
¿x‚cZ
M15
ƒ7N<=r

<¿ijZ_
EcoliM15(PQE30/cgt)。
m
2 
N9®dk¤
PQE30/cgt
‰m’
Fig.2 ConstructionofexpressionplasmidPQE30/cgt
2.2 
N9 αCGTcÕ E.coliM15(PQE30/cgt)
¤llcf®dŽ‰XY
2.2.1 
cåQ@`SαCGThijEF)
pÇVP
LB、TB、SOC、SOB、M9
Ä

¬‡ˆc
åQ½ñÃ:pq

ÆÖ

Òr



âï

“
TB
cåQr
,16℃

96h
V‡ˆ•
OD600j¿
23
€
 
m
 

 
4
 
¿
 
À
  
!
10
"
 
646,`
SαCGThÃ:Š]j5209U/mL,ôý
,Ü7McåQ

7äRâ!Õ
:TB
cåQEbå
úpÃ:‹‰

Œ7Ոœ23mEõ™:]

â
÷·1ƒ‹E^€

žZ²c6cåQEJû
ìP

,?TE‘AE,‚þ

Õ(2]TE‘A
Eij™
[15-16]。
m
3 
YmnKžN9αCGTc®d‰¡U
Fig.3 EfectsoffermentationmediaonbiomassandproductionofαCGTase
222 IPTG
£@`SαCGTaseijEF)
pÇÎcåQr~¹ê£E
IPTG(0、001、
002、005、01、05、1

2mmol/L),

96h

h:

/æ‹Ö
4。


âï

cåQr¹
IPTG
ö1™‘AEij

hÃ:Ší
815U/mL,

Râ!“Ü
PQE30
ijø,Õ÷
T5
Dã­fŽ
qCE

“ö[B E&½Àöoµ™E‘A
ij

“
pET
ø,r>‘ö¿øEEÑS
[17]。IPTG
£í
001mmol/L
ë

¶xhÃ:Ší
5209
U/mL,
6V)
IPTG
£E7]

h:¹Æ2]

m
4 IPTG
8÷žN9αCGTc@¤0ˆbc«f͉¡U
Fig.4 EfectsofIPTGconcentrationonbiomassandproductionofαCGTase
2.2.3 
¯¢‹¯’w@
EcoliM15(PQE30/cgt)
h:ijEF)
pÇVP…
IPTG,

IPTG24h
VÆ~
¯¢‹6¯’wEÍ.@`SZ½ñ[Bcå

16℃
Àþ&
12h
3«˜µh:

/æ‹Ö
5。
m
5 
opq¶or£žN9αCGTasecf®dbsÁnt‰¡U
Fig.5 EfectsofdiferentinductionmethodsontheproductionofαCGTase
33 
!

# QRYþ
:`
Sα abcdeDQfghijklE,-67^mno;Epq
  

5(a)
âï

“cå
12h
ë

hÃ:Šâj
1639U/mL,
h:ijò@2&

ã‰~
IPTG
[
B
96h,
‡ˆ•hÃ:Ší
4878U/mL;
(ʯ¢
‹¯’wEhÃ:Šij™“?
(4406U/mL),
â!8Ü?ò±­EÊ@<=ú6oµE›
”

ÕÖ
5(b)
â÷m´


24h
V

ÎcåQr
ʯ¢‹¯’w

ÂH“
36h
ë=ŠöLph
:Eöø

(ã•~
IPTG
EklÀ

3ô[B¿
À‚`ShE=Šöø

‡C¯¢‹¯’wâ÷
½`SαCGThE=Šöø。
2.3 
N9 αCGTcÕ E.coliM15(PQE30/cgt)
¤ll·uv‰®d
2.3.1 
deD’™£@`S αCGThijE
F)
pÇVPdeD’™£í
06、08、1、12、
15

2g/L,
iD’™£í
1g/L
½ñJ[Bc
å

@çSP
001mmol/LIPTG
[Bcå
)。
¹ê
’™£EdeD@Z²E€;6h:ijEF
)Æi

Òr

0deD’™£í
1g/L
ë
,OD600
¶xâj¿
111(
@çSí
646);
0deD’™
£í
12g/L
ë
,OD600í105,` S αCGThÃ
:Š¶]í
5888U/mL,
iôdeDEÊâ÷Â
½Z²E€;

®
1 
_`Äýþ8÷ž@¤0ˆbN9αCGT
cf®d‰¡U
Table1 Efectsofglucoseconcentrationonbiomassand
productionofrecombinantαCGTase
ρ(deD)/
(g·L-1)
OD600
hÃ:Š

(U·mL-1)
0 646 5209
06 91 4874
08 94 4952
10 111 5043
12 105 5888
15 92 4791
20 87 4359
  
l

@çSí
001mmol/LIPTG。
23.2 
iD’™£@`SαCGThijEF)
iDâìí

h[B D<=FP

x¿C3
¸µ6deDE¶·’™£í
12g/L,
R"VPo
øp¹ê’™£
(06、1、2、3

4g/L)
EiD½ñ[
Bij

@çSP
001mmol/LIPTG
[Bcå
),

‹i
2。
8i

âï

0
10g/L
iDë

2â÷[B`
ShEij

0iD’™£í
3g/L
ë

Òij`S
hEÃ:Š¶]

j¿
8635U/mL(
Ã@çS2]
17
ï
)。
)iD’™£Ež

Z²EcÌÍÀ
,

nôiD’™£–]¹FÜZ²E€;

®
2 
wÄýþ8÷ž@¤0ˆbαCGTcf®d‰¡U
Table2 Efectsoflactoseinductiononbiomassand
productionofrecombinantαCGTase
ρ(iD)/
(g·L-1)
OD600
hÃ:Š

(U·mL-1)
0 65 5209
06 91 4986
10 93 5888
20 89 7971
30 87 8635
40 59 3591
  
l

@çSí
001mmol/LIPTG。
  
8i

óâï

x¿@4ÀZ
EcoliM15
(PQE30/cgt)
Eijkl½ñ,-

‡Â“
TB
‡ˆ
cåQrÊ⣍í
001mmol/LIPTG
öFÜ
αCGThEij,¶âhÃ:Šj¿5209U/mL;
@4ÀZ½ñJ[Bcå

‡ÂdeDiDE’
™£pÇí
12、3g/L
ë

öFÜ`ShEij

h:âj
8635U/mL。
M—
rs¦ò@p­’™
;1,2—
@çSE=ÑâË;Sp

¹Ë;Sp
;3,4—IPTG
[BÀE=ÑâË;Sp

¹Ë;Sp
;5,6—
iD[BÀ<¿EâË;Sp

¹Ë;Sp
m
6 
xyuvxyžN9αCGTc®d‰
SDSPAGE

Fig.6 SDSPAGEanalyseofdiferentinduction
methodsonproductionofαCGTase
24 
N9sÁ‰®db
SDSPAGE

ab¹êklÀ

¹[B 

îP
001mol/L
IPTG
[B

îP
3g/L
iD[B


94h
EZ²

<
=>WV

„‚•±š3|¢

©YJ—²P‚\Ë
‚

pÇ3„‚•|¢6˂VEJ—²½ñ
SDS
PAGE
²˜

/æ‹Ö
6。


âï

“ò@p­’™
43
€
 
m
 

 
4
 
¿
 
À
  
!
10
"
 
:72×104
è

öTE‘Akß

t˜Eò@p­’
™x£ò˜

!/æšh:˜µE/æ>ò™Ž

P
3g/L
iD½ñJ[Bcå

¶]hÃ:Ší
8635U/mL。
R"VPiD[BijTE‘A

25 
N9αCGTcaYzü{|0CαCD
ë*²ørâË;ñ°E’™p?í
1%,
à
400U/g
h:ã{Ê¥h•

f-
24h
V

P
HPLC
pq^m&½

Ö
7(a)、7(b)
pÇí߀
(native)
`S
(recombinant)αCGThY-ñ°f
-€ú αCD、βCD、γCDE HPLCÖ¯。i 3í
αCD、βCD、γCD3¬^mښEÃÁ,7r8`
SαCGThY-€ú3¬^mEÛpÇÕ74%、
217%

43%。
ò@Ü߀hY-ñ°f-VE
αšβñ+ÌÃí24,` ShY-€úE αCDÒ
šÃ›:]
(ᚠβñ+ÌÃí 34),â‹`S
αCGThûöQ]EαCD°º;。
m
7 
aYCü‰
HPLC
m’n¯
Fig.7 AnanlysisproductsbyHPLC
®
3 
züaYCü‰« 
Table3 Ratioofsubstrateconvertedintoproducts

œm

(U·g-1)
ñ+ÌÃ=
/%
α β γ
α∶ β∶ γ α∶ β
߀
400 662 279 59 112∶47∶1 24
`S
400 74 217 43 172∶5∶1 34
3 
‚
 
)
úÿ|}6
E.coliM15(PQE30/cgt)
4ÀZ_

©½ñ6‡ˆklE,-

“
TB
‡ˆcåQr

IPTG
£í
001mmol/L,
ݍí
16℃
ë

h:â
j
5209U/mL,
ù[B 2]6
64
ï

Î
TB
‡ˆcåQrʯ¢‹¯’wâ÷ÂHLp
‘Aöø¿=Š

*PJ[BcåQ

‡ˆ•h:
j¿
8635U/mL,
ý;]Ü÷
IPTG
í[B ëE
‘Aij&½

8Ü[BcåQûö?B

}

͋E,v

ùŽÜ4lxáZ*P

`Sh‘Af-âË;
ñ°C3iô
:`
S αCGThûö:]E αCDf
-^=

öËPÜαCDE4l-€^。
M¼6q

[1] LowKO,MahadiNM,RahimRA,etal.Anefectiveextracelu
larproteinsecretionbyanABCtransportersysteminEscherichia
coli:statisticalmodelingandoptimizationofcyclodextringlucano
transferasesecretoryproduction[J].JIndMicrobiolBiotechnol,
2011,38:15871597.
[2] LiZF,WangM,WangF,etal.γCyclodextrin:areviewonen
zymaticproductionandapplications[J].ApplMicrobiolBiotech
nol,2007,77:245255.
[3] QiQ,ZimmermannW.Cyclodextringlucanotransferase:from
genetoapplications[J].ApplMicrobiolBiotechnol,2005,66
(5):475485.
[4] ValeDel,MartinEM.Cyclodextrinsandtheiruses:areview
[J].ProcessBiochem,2004,30:10331046.
[5] SzenteL,SzejtliJ.Cyclodextrinsasfoodingredients[J].Trends
FoodSciTech,2004,15(3/4):137142.
[6] ShimJH,SeoNS,RohSA,etal.Improvedbreadbaking
processusingSaccharomycescerevisiaedisplayedwithengineered
cyclodextringlucanotransferase[J].JAgriFoodChem,2007,55
(12):47354740.
[7] DavisME,BrewsterME.Cyclodextrins:basedpharmaceutics—
past,present,future[J].NatureReviews,2004,3(1/2):
10231035.
[8] HolandL,RizziG,MaltonP,etal.Cosmeticcompostionscompri
53 
!

# QRYþ
:`
Sα abcdeDQfghijklE,-67^mno;Epq
singcylicoligosaccharidesandfragrance:WO,2000067716[P].
20001116.
[9] HedgesAR.Industrialapplictionsofcyclodextrins[J].Chem
Rev,1998,98(5):20352044.
[10] 
U8‹

\-øbîcZα abcdeDQfgh“x‚
cZrEij67^m°º;pq
[D].
‚ž

Żx
M
,2009.
[11] 
ÁŸ­

 ¡¢

hÜx‚cZ‘AEij

•ò^¯q;6
‰-W½¾
[J].
ruÖM-M
:B

,2009,39(8):711727.
[12] BujardH,GentzR,LanzerM,etal.AT5promoterbasedtran
scriptiontranslationsystemfortheanalysisofproteinsinvitroand
invivo[J].MethodsEnzymol,1987,155:416433.
[13] LeeKW,ShinHD,LeeYH.Extracelularoverproductionof
βcylcodextringlucanotransferaseinarecombinantE.coliusing
secretiveexpressionsystem[J].JMicrobiolBiotechnol,2002,12
(5):753-759.
[14] 
£hv
F,
Û¤°
R,
§h¥
RE,
þ

cap­€mMC3

[M].
§8¦

JŽr

 ­Ã

þ

’k

ÖM´“
o
,1998.
[15] HarisonJS,KeshavarzME,DunnilP,etal.Factorsafecting
thefermentativeproductionofalysozymebindingantibodyfrag
mentinEscherichiacoli[J].BiotechnolBioeng,1997,53(6):
611622.
[16] PandaAK,KhanRH,MishraS,etal.Influencesofyeastextract
onspecificcelularyieldofovinegrowthhormoneduringfedbatch
fermentationofEscherichiacoli[J].BioprocessEngineering,
2000,22(5):379383.
[17] TakeuchiS,MandaiY,OtsuA,etal.Diferencesinpropertiesbe
tweenhumanαandβcrystalinproteinsexpressedinEscherichia
colicelsinresponsetocoldandextremepH[J].BiochemJ,
2003,375(pt2):
櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒
471-475.
,012
#$Œ}~ôV€Ö§‚
vu¤§xMuÁMNþX|E³´É‘“

ÖM

gŽ|Ѩn

Mk~&6C3f|ˆ<=“â!
7¿CüR\›”ëEë*°›

|ˆ<=Õ{܀©i+E<=

˜k_ð+ÍCüR\Eª©

ÃÆ
ˆÝŠiE|ˆ<=n7¿.ŠØç5EF)

(«L|ˆ<=n7¿y¬EF)

vuֳɑx¿~&‡Â

|ˆ<=“7¿-ÜCüR\ª©ë

nöø´o¬°lp­

-¬p­
nw:_ÐEêë<=
,`
˜k­®Ûôöâ!üXE|ˆ<=

7š"êë

C3f¯²7ML{Eê
ëSa>öD-¬p­w:6

3ôêëø,ÑCöø´x™8²

-¬&ùšX²¿Û뇀Eë*
òê

“¿Ûë

êëø,E-¬ë*Õí6¢{½Ê²ÑEO°þ¿Ûä

(“8ü

ãX

E]HÀ

êë
ø,E|Üë*Õí6°œ¢{±Ü8ܪ©R\(^€E

â!CüEB,
,?²ü¹³

ƒ„…†#0ü‡‘ˆ5Ü&@‰Š
VfnF´vw45Eo¬

€m"

!íy•µ¶Eñ92GÝ·}EŒ

-¬8oøp¸¹É
€SúE°l"*PE‡ŒÍm

šº»€^€E€m¼ŒÍmo«

-ܸ¹É€Jõ€m¼Œ
˜k“RS½ºën‡´>^¼Œ

Øm€mM¦Ç¾
·
¿À¶Áir

-¬ZsՓ³â÷JuJÃ
EŒhÍ+Ï
Mn
:“
˜óðûöy2Š

-ÕRí˜o

¬“xð&½Àۏ¹ÄŸEj
Æ/Ž“oq

ºAíŹÆËþôÉöÑC“J¦cå
7ÕìíÇÇ-oY.EÍm

˜ò0öÈ

±ÑDç)EÉñSÉÆ"øEàÍ

±Ü‡¼2GêʌhEàÍ2Õ*P-cW‡ô
EéY6à
。”
nF´vwAí

!UBâ÷FP‡ŒØmç)˟£S


&V3

63
€
 
m
 

 
4
 
¿
 
À
  
!
10
"