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Preparation of(S)-2-chlorophenyl glycine using penicillin G acylase

重组青霉素G酰化酶拆分制备(S)-邻氯苯甘氨酸



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ChineseJournalofBioprocessEngineering
Vol.11No.1
Jan.2013
doi:10.3969/j.issn.1672-3678.2013.01.002
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JOPI
:1672-3678(2013)01-0005-07
Preparationof(S)2chlorophenylglycineusingpenicilinGacylase
LIUXue,XUEYaping,LIUZhiqiang,WANGYajun,ZHENGYuguo
(EngineeringResearchCenterofBioconversionandBiopurificationoftheMinistryofEducation,
InstituteofBioengineering,ZhejiangUniversityofTechnology,Hangzhou310014,China)
Abstract:CultivationconditionsofrecombinantBacilussubtilisexpressingpenicilinGacylasewere
investigated.Theoptimizedfermentationconditionswereasfolows:solublestarch100g/L,peptone12
g/L,yeastextract3g/L,andNaCl10g/L;fermentationtemperature37℃,flaskcolumn80mLin500mL
flask,andinoculationtime28h.Undertheoptimalconditions,thepenicilinGacylaseactivityincreased
from734U/mLto1823U/mL.(S)2chlorophenylglycinewasresolvedbyenantioselectivecatalyticof
Nphenylacetic(R,S)2chlorophenylglycineinaqueousphaseforthepresenceofpenicilinGacylasefrom
recombinantBacilussubtilis.Whenthesubstrateconcentrationwas100mmol/Landthereactiontimewas
4h,theconversionreached44.2%.(S)2chlorophenylglycinewasisolatedfromthereactionmixtureof80
mmol/Lsubstrateconcentrationinenantiomericalypureform(>99.9% e.e.)and9429% yield.
Nphenylacetic(R)2chlorophenylglycinewasracemizedat170℃ forrecycling.
Keywords:penicilinGacylase;(S)2chlorophenylglycine;resolution;optimization
   (S)
UVLSø,
[(S)2chlorophenyl
glycine]
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Fig.1 Preparationof(S)2chlorophenylglycinusingpenicilinGacylase
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10g/L,
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5g/L,NaCl
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•–ƒñ
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2。1H NMR(500MHz,
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737(s,2H),728(s,5H),722(s,1H),579(s,
1H),356(s,2H)。
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2 N
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2chlorophenylglycine
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5417min,N
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3713min;(S)
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G
3 
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SDS PAGE
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Fig.3 SDSPAGEofsupernatantofrecomibinant
B.subtilisWB800
2 
XYSZ[
2.1 
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SDS PAGE
¥¦>¢
  
.ùŽ)‘%0¨)+%.ì`
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±t™~J9

­s
SDS PAGE
þׯ¨

áâ¡
ð

*-

æð

ò(™Ø`
PGA
` α [0Ç
β[0,.þ.ùŽ‘%Áºðz.ì`PGA
¯Ù̺)î

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(S)
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bcd

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10g/L
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10g/L
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4 C
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PGA
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growthandPGAexpression
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æð
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ï

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–

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12g/L
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3g/L
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iš¿

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Fig.5 Efectsofnitrogensourcesonstrain
growthandPGAexpression
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pH
%ß&ÈÇwÔ`€
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./0

%$`
PGA
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•–”
pH75
¿%$`¾Ô1ìÌ_:
(1304U/mL)。
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‹Œe‚l9&R¿

Ô12ïD@ðñ
,¨
©`
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kl
75。

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pH
t…†c˜­’
PGA
§¨5wx
Table1 EfectsofinitialpHonstraingrowth
andPGAexpression
pH &^

(g·L-1)
¾Ô1

(U·mL-1)
¦Ô1


5.0 4.65±0.14 8.30±0.25 63.65
5.5 5.10±0.42 8.18±0.29 67.73
6.0 5.13±0.04 8.95±0.27 68.63
6.5 5.25±0.71 10.09±0.28 77.38
7.0 5.35±0.35 12.62±0.52 96.78
7.5 5.63±0.25 13.04±0.14 100
8.0 5.35±0.42 12.74±0.52 97.70
8.5 5.20±0.25 11.65±0.63 89.34
9.0 4.88±0.03 10.72±0.70 82.21
2.2.4 
`a³%ß&ÈÇwÔ`€
23§`a³%ß&ÈÇ
PGA
12`
€

àá§
25、28、30、34、37、40℃
Õ֐`³

áâ(.
2。
4/³*Á
(25℃)
Úùj%$`


³”
28~34℃
./0

%ß&ÈòßµÔ
1ÞÁ

)Ô11Z<=³`e‚ue‚

%$
”
37℃
56D&È_ß

Ô1_:

4h~–Ô1
ì
1376U/mL。
³­dõ>:

¾Ô1˜@Áð
ñ

*pàá`a³Ö
37℃。
§
2 
rst…†c˜­’
PGA
§¨5wx
Table2 Efectsoftemperatureonstraingrowth
andPGAexpression
³


&^

(g·L-1)
¾Ô1

(U·mL-1)
¦Ô1


25 4.40±0.14 6.87±0.01 49.93
28 5.35±0.35 9.53±0.04 69.26
30 5.48±0.25 10.76±0.37 78.20
34 5.40±0.07 11.15±0.23 81.03
37 5.88±0.39 13.76±0.13 100
40 5.70±0.07 13.70±0.04 99.56
2.2.5 
€ó~^.ù%&ÈÇwÔ`€
ßôó&”`a¿

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¦«O’

‚VƒÇ`a0ó~^â`€


§‚VƒÖ
150r/min、500mL
¿`R€–
Ú¾ó~^&^ÇwÔ`€

áâ(ð
6。
æð

òó

{ôxûÔ1˜‚€

íó~

80mL/(500mL
R€

¿

&^ǾÔ1
]ìÌÿª

¾Ô1Ö
139U/mL,
e(
,PGA
12øƒD@

G
6 
±²³ž™tc.˜j’j45wx
Fig.6 Efectsofmediumvolumeonstrain
growthandPGAactivity
2.2.6 
Õù`a*+–%ß&ÈqwÔ½Ë
4h€ò{n

”}Tn``a56D4h`
a

Ù¿C9™Ù4h~`
pH、
%ߜ³Ç¾Ô1
âÊr

áâ(ð
7。
æð

òó

”%ß`a*+
–

4h~`
pH
<`a¿Õ`e(júóD@›
ûü>:

òº¨Ö”r&È#%ß&È*"

Cô{ôچ4&ýôþÆw&,Cô
pH
D@

n#<=

ÿ

ùi

ï…Ý0øq%ß=
{Cô
pH
t>

4h%ß&Ȕ
15h
­sØÙ#
n

%$w
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xûë!e(


PGA
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”
28h
õö
PGA
12
ìÌ_:ª
1823U/mL,
©¿&^Wì_‚
55
g/L。

&^ǾÔ1б
D@

¨©4h`a
28h
Ö&

G
7 
´µ“”¶·?c.˜­’j4¸´¹º
Fig.7 TimecoursesofcelgrowthandPGA
activityinbatchculture
2.3 
4»¼@©ª5½¾
2.3.1 
ԝh`¿Õ­+
z
4.856g(80mmol/L)N
LN„
(R,S)
U
VLSø,{j
20mL5%
øx–

i
2mol/L
Ì,
k
pH
l
100,
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728U
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KJú

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d{Ž`°±VZ[\q•Ì`


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,101787032A[P].20100728.
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f
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,2007,35(6):4448.
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LM

DPQ

â

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S (+)
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®¯O„

–,
,101497575A[P].20090805.
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TCU

aVW

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S (+)
UVLSø,`°±


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,101560533A[P].20091020.
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11 
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