Jouwer or Tnoprcer- Bror.ocy Aro Coussnvrrror, 2 (1) : 27-50, 2006
Research article
Screening microbes isolated
from Melalap, Crocker
Rangefor inhibitors
against both
prokaryotic
andeukaryotic
signaltransduction
andisocitrate
lyase in MycobacteriumPU.dH S€ok Hw4 HEW Chaw Sen, F'OO SekEin, ONG Si Mon, HO Wei Loon, LEE Ping Chin, LIM Siok Har and HO Coy Choke*
School
of
Science and Technologt, Universiti Mal ay sia S ab ah, Locked Bag 2073,88999 Kotq Kinabalu, Sabah, Malaysi.a
n
ABSTRACT. In this study, 65 soil samples
from underneath identified plants were collected upsfeam along the Melalap river.
One hundred and thirty-six actinomycetes and ten microflrngi were isolated using selective isolation methods. These pure isolates were cultured aerobically for secondary metabolite production. They were screened for inhibitors against three yeast-based molecular targeted screenings: protein phosphatase 1 (PPl), glycogen syrthase kinas€ 3p (GSK-39), Ras/
Raf-l protein-protein interaction, aad two Mycob acterium-based screening systems:
isocitrate lyase
(ICL) of
the glyoxylate pathway and PhoP-PhoR two component signal transduction system. Three extracts (H11329, Hi i337 andHl1402) were toxic to yeast in Ras/Raf-l screening, nine extracts were toxic to yeast in PPl screening (Hl1293,H11298, Hl1300, H11301, Ht 1302, H11304,
Hll3l7,
H11339 and H11402). One actinomycete strain Hl1299 showed weak inlfbition to PP I . Two extacts (H 1 1 329 andKey words: Actinomycetes, microfungi, two component signal hansduction, protein phosphatiase
l,glycogen synthase kinase-3p,isocihate lyase
.:
hocoychoke@yahoo.comII1 13 64) showed weak inhibitory activify and
tlree extracts (Hl1339, H11337,
Hll402)
showedtoxicity in
theGSK-39
yeast screening. Five extracts (H11310, H11317, H11337, H11346 and H11383) showed toxic effect in the ICL screening system, and oneextract (Hl1392) possibly showed weak inhibition to the PhoP-PhoR two component system. It is interesting that Hl 1383 has th€
same inhibition characteristic as H7763, a presumptive ICL inhibitor with a wide partial inhibition zone on acetate plate (Dain, 2003).
INIRODUCIION
Actinomycetes are common Gram-positive bacteria in soil, composts, river mud and lake bottom. Rich soil tends to have a high yield
of
actinomycetes. They are characterizedby their high G+C content and cell wall compositions.
Actinomycetes together with fungi are avid producers of secondary metabolites with classic examples being streptomycin and penicillin. As chemical novelty associated
with natural product is high, metabolites produced by bacteria and fungi provide great stmctual diversity (Hawey, 2000).
PUAXSnH!^HEWCseSE{FOOtukH,ONc$MoN,
HO WE' LON. LEE
FN
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biodiv.ftiry rcsoM.s, but d€tr Poc'rjalb* yd b h.
tully
.xplcd.
M.labp iso..
of rh. sub- shrioB ar de sourh.m ftgidi ofriecrc.ktr R,,s. f,*, ro r.r undd
tn? Boneao Biodiv.Eiry and EcosyscmcdB.mrion
(BBEC)
Pbsffi..
Prcvims .tudi.s haw ircrudld aG4 n* M,nu, ulu
s€msrn€,urrKi@i
andGuuleEm 0i.kr,2001j
ch e,.r,
2004), wnidft siurd
ioln.
ThestrhrorbidrdsiBllymdv..ohpdmds
h ledEro*pro
ln.for&,Ea
jn rhe hop.of
indinshigrdmrx.biatdivditdr!ryidA
betucbm.
ar obbioiqusfti
comeoDirwdnohbdronsoil$ftpr.s.ollededaon ju!
beb* nr?l6flin{ss
rh. degftdidd! orrhe
lsfridd
,id.rher de?d dgznj.mr.rhl is.drd
byni.sbs
ofshich manyft
fiDsi.nd acrinonycdes.
rh.k
{ic.obesw.E
prcdu.d by
d,rd
fr6kfem.nhrionofrhd.
brgded $rcenins in
&zrh
for biolosicd innibiton. T]1de{?r.
lbreey.
r-Msedscmingsysfurd,ptdindfusbdrlh.
$re.nii* {as desined ro scre.n ior inh$itus
ifiecridgmdmrlnn RasRlf,r inr6.t'd, (Ki., ar,
tees)."hc csK-3!
dedD3 d.Er i*ibib6
anetios dEasK,
3p pr'lt*ry 6ndoh a ar. 2mq.
rn Forin sdnribi.onii.
phospbausesinlrbnoF Krdins r* 6'!.bn
dsftin
pbo9hatu.I
(Andr4& Sbk
2000)turiakin 4ad
pm6in pbolPh"bs baE ben foEd ro
b.
imponrd dne brg!ts
sin*
rhe la$ decdqwilnpotnti u.
in meftrd.d
orvanoN dndss(cohq
2002), irctudinecc-r
ahdAFn am &4 so ,ntDrdahnz-br&d
,beErdn babdnboubb.rh.6u'dv.
3sd
of .he d.adrybbftuldn d!tr. or
ofdieinpMttuc4ofp.BisdTBi0tr
doDi! dE isEihre
lye
orrhe slloxytd. psdwiy (M.Ki'nry d ar, !000).nr
FhopphoRtu
cor'pon
Eignilrcdudiotr syr.n
isin4otur
foir&,rod,rr, sNjvdln
lun€, whnh is alltnr
iia.dionfidor
rFodbDdr,2@)
]i'5,4'4dr
tu?lr5 isueds
n'! n .u dbe..!lo*
scn ssi$
advrnEs* or .asy ,nd.ffi.idr
gc.ericmlipulariors b*ids
b.ing . farsre*
(Jr.bs, 2000).M.AiI!ru{IJANDMETEODS
sznptilg foi rhis sbdy rook Dh.. dDrina rhe
Merd:ps.i.nrifi .ExP.d
imc4 1 &h,ry,
2004) M€rdap n situ4.n rt rh. sourb.6 .nd
df$.
cr@*er Rarye in &. d]3rid of renoq$b,[m.Erp.dilionBs.e4w.snol
cdfrPletly undistubsd
a
n\erc verc sdnsoft,b,ndored pl
r.d ddp4 Pa.icutdy ocor, *fth vinEsds livingl.s i}'l
fry.kn
by
fir
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soik
wftsmPr.{alocMllahp Riq
on$medm row&
dEbirk@€ig.
r).rb.a ftE
fiE $n'plincldcdjoEtu.da follM:
smpisi€B,mdd6 o.toiMyF@r.
BN
crmp, indudirc &..8. D{Mdililrd
kdtl
ardTrnburDr,iwdrGfj s
. c,2-5 knrynil d
rtu j.ft side ofln.;&!, lmod
1mc2000 m 3,s'l]
sil.!
Dtd I,
side.db
ln.
rdlh-6
andwsicFdirtr
mdles
sanples
*de
condbd6onb.tow bigftd,
ScREENITG MrcRoBEs Ftorr MSI-AI-Ap Fon lNlfinons
litters were collected aseptically into sterilized bottles with th€ aid
of
sterilized tongue depressors.Soil pH determination
Ten grams of air-dried soil sample was rnixed with 25 mL of distilled water. pH reading was
taken using a calibrated WTW
inolab
pH meter.
Isolation of actinomycetes
Actinomycetes were isolated by plating out diluted soil suspension onto humic acid B vitamins agar (I{V), arginine vitamin agar (AV), starch casein nitrate agar (SCN) or diagnostic sensitivity test agar (DSTA). Cycloheximide was added
into the
mediato a final
concentration of 50 mg/L to prevent fungal contamination. In some cases, pre-heatment of soil samples with chloramine-l phenol and
D
E Ii:
EI tl tI
t:_] tt
trl r-:-.
Li--.r
9CALE
0- **l_,kt Figure 1. Topography map of the study site. Contour lines are in feet.
+
Nl$.*ll.d r....il! (1! &Lr[a)
trLl:r.itt"25. Murl$1t52 urL7.,t r.!0, Mu.tlalrar,
heat treatment at ISOC for two hours was done. Distinct colonies were streaked onto oatmeal agar (OA) for observation.
Selective
isolation oI
Strcptom!cetes (Nonomura and Hayakawa, 1988)Soil (0.05 g) was suspended in 9.95 mL of
distilled water. The soil suspension was mixed by using a vortex mixer and ten times diluted thrice. One hundred gL of the final dilution was plated onto HV agar (humic acid 0.5 g/L, Na,HPQ 0.5 g/L, KCI 1.7 g/L, MgSOo.THp 0.05 g/L, FeSQ.THrO 0.01 g[-,CaCOr0.02 gl
L, thiamine-HCl, ribofl avin, niacin, pyridoxin-
HCl, inositol,
Ca-pantothenate, p-aminobenzoic acid each at 0.5 mg/L, biotin 0.25 mg/L, cycloheximide 50 mg/L and agar 18 g/L) and incubated at 28"C for 1-2 weeks. Distinct colonies were plated on oatmeal agar (OA)
(Quaker oatmeal 20 g/I- andagar 12 glL).
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Ss, FOO Sx llln, oNc sr MoN, HO WE'reN,
LBE P'NaCH'{ LrM S@He e
HO Coy CHops.lcdiw noh.id
orgz,b?dE,d!a,
soil
(0.1 g) was s$pend.d ines
mL or nL of ths son luspeEiotrM ta$f
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vldordjie-a
Tx. rnb.w,:
iicobn dd
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of the soil supensionrnn
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Li 50 ng/L cycloh?xinidc
va
also rdd.d).rhc $il .!npl.
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foroi. hor
ar lm'C,TG edsil
(0.1 c)
ra
suspend.d in e.e mr of di$indlHrd.tu$pe
ioi wrsdilurdMe ofir)
d 100 !I-
orfinr
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rI
f,, glyc.ror r iv!.
K2HPO.o,rs/L.
MgSO!.4O0.2 g/L, NdCl 03 g/L,
isd
15gL
tu er.n*:
Fe(sor)ir0fs4c'6o! 54o
1Ore/I-z,sojrTr,O 1.0 ng^.
rrnso.?HP
1'0 ore/l-' Nysbijn 50 be/l-,
cydoldiii&
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viMiDss
fdrrv {tr
dso add.d).c.tmi.! e.cpi*ed S.l..ltu kolrton orxdadir
soil (0.0s g)
ws
suspdd.d in 9.e5d
drfr-
of rh.so
sosp€nsidiws tusfaEd
ro epcar.d rnd roouLof
rhefiGr
diluredsuspeNioi vls plicd on Diagnoric
ffi
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(sismD3l34) codbining Prohse p€pbne l0 s/L, v.,r inflriod$lids
r0 yL.
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hydo.hrodd.0.01
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0.01 s/L,xerhiDc 0.01 gr-,
d.unb.0
00002 g/Ldd
as 15 s/l-. Ny srin 50 ng/L
and cydohennid.50 ms/L were add.'r PkErMi.nfMsi
weE isord.d byphriig
soit suspeNiono opdro derhsr isd
(PDA)7.5* (*/v) Nrct cddmphdicd ws
addeda dibad.n,l
PEmdoIofrclinony..l6
sporcs or sinsL slonies or
ndE4
sp.a- poducing adinomyecsvd
noEdi
o,096glycrclmdlaekl-2(lc'
conidir orsiosle colonies of
miftfuci *cE
kepl in
dhydnB
dlica gcl p,ilicles,l 4f
(Ogd4 l962). CulbEs weft presrv.d by
S@ r,lrooB Fro MnurmR
IxHBmroip.ri's0.3 6Lobidi,ft
nrrEridfr"gft m
susFndcd in 49! (w/v) nonjd
njl*
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12 x 10onntb..
ndrnn
dsirh
hydmus silicr selpdicles
(el2 ftrh).
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dry conplebly
i r
d.sEi6.oi sedenod Prodtr.dmorM&ry nld.botb
on. loopful
drdimnycr4
w@il@lald
inroh
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20 3/L.pcpion.20
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125
r!ft 1@.rrask,.dimbaEd3t?3'c
virh 3h*ing arz2orpnld 120
hos.aehre
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inbh
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10 gI-,Fpbre l0 94,
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6
a lin,lcon.deiion
of 50'9 arbse6b
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b$ed $rcedng.. 6rge.ing.r
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sere. For funhq confimarion,
Eaa.dn.d exret afbr
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byrdt4 U*byfie4dr'inEwass.d'
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(oN?c)
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w.Fn wM.ihds
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dsb,rddgr220rpn Otrhnrr.d prof
difi4ohbia ofrt
culbrcs*d.
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iirpraro
dfffi iisDrdiiEspefi etl Tle$rc.dirgn
di, ucd@ sinilr
ro rhemg.nandd?phls*c
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sd hdobn.:tl7'c.
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in sod,unic.br. d
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Trri.6, n6ur6rq
PPrsrqiig
---!Ll(Ei!4@t!L ---L .@-!!64!l
0
No iobibidd,@ mMd
papddic
P Pdidilnibirid oinglt6r.gEerhofysrsdmifibirimb..
40
lll or.idd
is rppli.d onth
diss.rMcMrc@sIM I'/txswm ImFoB
rrbre
?..Rdr!
fdGSK-3Fsmin&
H|2n-E
t1?8IIt14@
0
0
Noioiibidd
zotu adtnd pap{ d&.w w.,r.idibidorrh*j4sihifl,lycarEdu.timeiininidhibiridbft
40 pL
or.xtu
ir aDDlGd onah di*
:hbL7b.
R6ult
Io.E11t9.trn3?,8rr339,81364 Err{02Ri.h1mFLor6d.rdd.
P
Pdiari,nibi.rd shwi,s lid. si!*n
w
Wa*iobftiio $dwir! -nhi r.d
Edrcti@ wirliniohibiiolao.
HO
WEInr,
L€EPnoCm, LIM SMB,um
HOCdCilm Ahi.
&R.$lb lorMy..6€cedm
Ic],maning.
n3om,,@rd.rrd r@dt!
ECrs5Hllt46
0 0
P PMidiinibirid
sbowbsliri. g6{d ofntprocrd@
wirhbtitibidmzG
-4o
IL ord@t
i5:ppli.do €b
di&S(]r:EmordxroEhdl,Irlj4nlrlBlBmtr
45rrhl.e.R6ullrro.itrordk*ldPtoP-Ptdrt'o.modMts'sLns.ruhs.
g,,'0o,
Mlt
ohdqi6 il. stuir ne
ts s0 Noi ibidd
rod.3fud
paFr dilc20 d-
orexhr
i6 ippri.dd
ei.hdit
fttte10. cmdr'rddd.ldd.rcjofsl'dtrIItl3Din15,t[l'$ti4mrMudrnnof
t0
ll
0 .oiDbibirimzuetouldPiFrdis
PUAH
S4
Htrr, HEw CH^vs*,
FOO SFK tll|, ONC Sr MoN.prpdr
di$a pip.rt.d * crtrds ed.
Fcorded
afh
lwo days. Extucb sho*inginhibition only
oolow
concentationRASUUTS
sixtyfivesilsmpt4veE.ollsbddunng
rhe
dp.dirioi
13 smpl6{eE@lled€dnd sitA.'sn'pIdnmsileB.14smd*lM
€ilwl)
Th.so
plr in sic Antrgediron
sib D:4.s15.47. sire E: a.m 6.93 ('&ble 1).
Th. sMy
3ib
lhdw.n rypiclrchsderinics ,b?o
sp., ,|{arl,4r sp.. with only rewFi.!r
colleEd
sil.
Ninety-louoftheislarc wF
sunj.c!€n b phmol
pFeMo!
llisoldd w.f fion
DsrA. rdurroraB
yed pickedf,mAv ii
whi.h loir.dple, ldryenr h.d
pE beded wi'h
chlomin+r
(rable 2)dd
rn niciortrigi w*e
isotar?d frcm soneIi
lheerceiinc, dE? errads
(H11329,Hr B3? mdrl1,()2)
w.ardi. by*rii tu
Rdll.eonu.wheHllr'washoMm'
hkridiic codd not b. Gp.abd {hen
rer.d
in a Enes olconmftrions (Table 4) Hr1337 k.ond
t9ffi
s.ne,tu.zin
iihibi'ion or G saladosi&sesy
heds (Table5)
Ninedlds
(Tabla 6)wd
roxicb
y.ar in PPIffiins(HnDr,Hl1293,H1l30o,Hll30l, strl02, Hll304, Htr1r7. Err339.,rd
H11402). olre &tinonyere shin. Hl r2ee, shoved
qc*
inhibition to PP1.In
tbep(rifrii,ry
csK-3P r.r@ing r@r4@!
(El r329, Htt339,Hll364,Hl
1402)*,*ly
(Hl1337) show€d bxicity
byeai
crrble?a).inhibily.*tdily,ll7.cvh4dHl]339'
Hr 133? md H1r402
iihibir.dy*tsodh {
borh 2s"c and
l7'c
(rablc',n).Elrtu (HX3lqEn]]7,Hl
r33?,Hr 1346,rdd tsrr133) showed
roxi eff.dl i
Mrr?3m!i' lc,- $enins sy$d (IrbL
3).H I 1333
,l$
sho*.d a vid. pdial innibidoo(Hllrg2)
shos.nbxniq b rt eesmri!
cobr.9)
th.
gswrhidihrid
orHt r39zw6l.sirhthmsgd.simm.diunecomp
ed ro low masncim medium (Tebler t0,tl)
Fotri.irsds shovd,crivit il noE
rhan orc s.GDingsy$4
Hr r3r?(oiic
in PPI md toxic in IcL). Hl l32e (bxi. inR,iRdr dd
po$'brE inhibiro incs(
38), Hr 1337&nc
in ReaRaf-1. CsK-r9 edIcI-), Hl1339 rbricin csK,3tl,di. i
ppD, Hl l4o2(bnc
inR eRrr l. PP13ndcsK,3p),soil pH Eadings uken indimrd$acoil rmn
sitcwsmmeidic*jthvalresrugh3
3 63-{.6X Hr 1337,H11339. ardHr 136L *hich
colled.d
fion sir
c. As icljnomycese
(Holt
r 4l,
1994), the enumeration or bioacriviryprcddi*
adinomyceesrDn
acidic eir is orinrre*.
ft.r
i3,io*cvc. se
posibility rb
rbe isol,riotr modidhav.resticr.d cowrh ol
sne
etioomymGit
ddic
conditiois 64
aEJrepr,n)..r
bbrd
tug.
ofpH in higrrdsric
loadmdia
(r$tu,r,r,
2m5),Mos@riiom'€b wft
isorded
ron
so smpres.oerd
6'msib
B, sn of $en showed $tiviry h
eEqing.
Sir oui or 14 isolares
sle.bd rbn
DSTAftdim
sbdeedbxic .ffed b![ds
PPreennu,rs
y hieh a mmeff.n @doni*
isll@d
ftld Irv dd
oths nedia. Tnous!biolosisly divc mhboliB,
rh.!@i6c
lnoh
Soi!reF
monly oned€d undd bis ,Jrar$. nimbial comldt
conposirjoiaMyd
.r,r.,
2001).ftc
r.pon of high.rn1d*r6o,aodr;,bd
sils aYu.20Xlsd
the
.$oci.rion! of ditfer.n.
micrcbirrconfunni.s rirh dirfereit
gra$laodolmunity
iyper (Mccu .y & Btrrrr., 2004)eddPl6oflheeflebo'di{ldhAbibb
on
ni.sbi,r
rbud,ncEfd
diveEity.''e3,a!r
mdbncny o'
rheyeat-bs.n
R.s,/R!f-l pEaii-pto€in inGractioo
ffi
d.rxe nm.sp..ific
srioi qs
!\encoolllmd
by
mn fdrrion of d. o,caraaordas
as Escd by nsi'g HPLC fmdons (d!a nor rhown). In
yed asK rll
sceninc, Hr 1329rdH
t 136{onlyBux€dinp.sitive inhibnion highconc.fu!.ion (r00ul). Fu
herasK
39nr,jbibn nieit
be ucturii
rcw
rhenpeuric rppncanotr
rre lHo$
sysrm dtuodB, lypc 2 dhbcB..der sM-.en
biology dd
ncddari€
n€dicine(Meijd,r ,r,20o{i stooF
& $bodFtr, 2003). RAsMA?K inhibiroN
my
aho nnd rppriqrionsin
c,ffilnedpy
(Hoben 3r,r.,2noti seb.n- L€pold &Hefts,
2004) G.ldrndycin lnd6di.i.ol4 tu
*amprsofindielR
!,Rrr innibirG ofni.obirt
ongini b.rhdeae R
lwel by bbcriig de Raf-Lsp9o comptex {suncab 4 dr, 1997; sogr d ar, r993),A nor
specificPilinnibiioi
BAY 13 9006,n cufttrdy
uidssoins ctinical niat for rbedeyer@enr ofsn
sri-cserdna G,oa,!
oa, 2001).
FKJ06
d cyclGpoinc
rwoimuoosnppamt dngE
6g.td
ar PP2B, aPro'eir
phosphabse(cobcn,
200r).N.@logical disordd, nEhboli.
disd*dd .ricq
hav. been a$ockted wirh pioGir pbosph,bas (Mcouksy 4u r,2002tioe
porenrhl druss rarsering
protein ruh€rculosis is srirlrbreddiis lil
dGpirerhe
rv.ilability
orvdous
dnss.cxftdr
m mtim,r rB drus G
h@ryetr&riE
sgains erively rplicding cans, bur dry
*
res poEnt ssaibi
cdk
in ddiooa'r pbae,when riey
c
capsble ofp.ais.itrs iftide lne huron lma (McKinney 2000). rhererdc.inhibnos
hg.ti's ldcil
peBieor T3 is or pobnrial u$.nr,r,.r?ri!d lcl,
and PhoP PhoRire
suchtacro bn,. i(r.4!/o'rr iit .tidr
(McKmcya
ar, 20m! FoMn g!Th.
lefch
for bioadive m.r$oinosha pan
rwo decads.Tb.
'pplic
ioosot
recorbioror
DNAconshdioi
of$enins systu a
in deRasRdl ffi
hd GsK-30 mrde Fssibl.wirh
'ewq
phtrneoroeical *iowtedsq d)e.xprnsion ro other
nicmbi,r
sourc*hd non
tibiotic typ.mbbolirs,
hd embt.dsinplified
dcor
enicient nc.hodsroi
novel conpounds di$overy
(obuA
1992).Mtr
rhm hdf ol rbe knorDsribions @
or ni.robi.l odgn,
PUAHS&X H{A,
HEwcs{s,Foo
HOwE rroN, LEE
Pnccm,
LIM s'odl'llmbi.in, dosdbi.ii.
ddftibnltin @
inpoi$r diobd
scehr (Dcmin, teee).an
invsdigarion by waog4
4r, (1999)rev.rled
!heieol!rioi of
36cei.a
orvith s|rcplonyc.t,
Naca.dia, and
st pbsro4tsinn 4 ij\.
mon
$uida ink
civesr
€pscnrationoflhcaclinonydediv.6ilyiDtheftpi..l
ni!
toesL Cdedrlno{d
didobc apei.sm in!
a dnytucrid
of rh. wbor.'.imbior dirnity.
They arc valuabl..e.ources in bitrchnology develoP@! dE@sffrid
or nicrobi.l gerc !.ols is
6*ndrl
ha bond
ovenmbd @un.,ur, 2000). saba\ bei.e
m
df
ft
wodd s biodjwniry hobpo6, offc6Range.
p.elimio
y€sulb
indicaterh.
isot.rion or
I nmb*
ofnFin, *i& w.d.
indud. two
!r,i6
otadinomycd* (Hl l3?9 8ndH11364) inhibirinc rh. csR.3bseni.c
sydem. and one
shin
(Hl t2ee) rbd innibirs@tiMye&
(H r 1333) b.hiv4like H7763,.pasunpriv.ii$bndorIcL$r6ing rysh
(Drim, 2003). Funhemore, rio'her n'issddyemphaiz:sdEu'rlzdimofbgn
miftbiar divssi'y
offtdmmyEB
ad tu@in the learch for
Yahable secondary nctboli@sfoi 6c
poonlialrE
nenr ordiserses
d Bberculcis. -rbe exr.osivecm.rer kng. Prk
(r39.9r9h(6s)
in sabaL wirh vaned bposnphy rndwgdtion
ryp.s,n
a uniquebiorosicd
resourceqdrinq
inv.niadiotrsud cor$ddion.
we wotrld
lle ro.xpes
ddipptui,rid
rdcon$niton
lor rh. invidion to parucipiein tbs qp€ditjdi.
sd
ro M. Jonnny Gi.il torhi
h.lp wilnjdcitiicdioi
ofde phG.
Dolois
subitr
(our sdded ror$et
fieldd!i.rd... rni! p6j.d
b tDnd.dbye
IRPAgfuatrmMalrysbnMjnistyols.jdcq lbcruorosy
d Envircl]lMr (01{210i033- EA0036)dd
Utrive$ni Malaysia SrbihFn'drb
.nn.+@hcmtB-0901'PRru0lI^dn
, P.D. & MJR,Sb*, (m).
It?c re(bwF4 Qrctkb. tund
olcdt
Bulr,^, T, .19c, wgd & M. e.odre[o*. (2000).
M.hbbb''dMfueblBbhDR.iq}'
N.*
& C.C, Eo. @04).Sdrcii8
rorhhiboEdotqodcM^P(liec
(M(Kr), Prcrh phNphd $
(Msc5,clcr)
@dMysbedd iNnuD
1yc.(rcl) rdn
dhonye@s udfihMsus fuogind{dnoec@bfuq.,.!j47.
& J.
N!
(ds )cN.r4.4r!. sd?'ar.
tutoen rtudat
oleathxtrr, 26' coi.q
c (401),ftorii ijis
r[. n.jor d^s64dld[.sdly.trsl..Uy?'d!E D!oi!. a.L oret Phlnlq'rdry eiiw
ANlEdMENbplwqdBbl.ch4alag'5z
DdD! s
(4Gl
sEniigformiqobdL iinjblonFo s.
qA., s.wfuE
& r. sDrd. (1004).hsgip'jonal!4!aioohmFbaddim
cxbd.tr,
E.^,(r00t,
Th. phioropt rvo.conFild 4uhbry
sF cn PhoP P|oa.b i d
af 3 @ ed ot @, tI
I rA 5r v2.
H,R4^.e000r sbt3i.! rordk6Y.iqdqs rremNoBLyumxdtrdIfula!d!.6
rr.obr., ri
w,R.c.00). rrder4d4i4'
ra@t$.
b. Gds.) d.ebr
G.n4bs aJ,t@ed44.
^sM
PE
*w4hi4bqD c
xi's'w'Kbhl4J'x'('o!',,.Elslnq s uoilo!
cLr. 0 rr3)_tddrifi*riod
of{e4itc,Fta run d
o1t*ibiard,
NlY ri!!!.
(r00sl. PH end,
otr r0c.c.
Ho. OoottAdnonFde iekrd
^ti.(.ds ).
) scic ilir Joun4
fhro'ghNdgdE@ryluadse4l4cdPn5ll
r &
a M.c[*!y,a'A.Trsio& k $k0r
o001tlrDak. orf4
APerrnbi da ndtiot t\6e6i. stu si6 rawd at dtu.t
shre
& s.rwnLn' oeq), 3?4r
s@utoltulq
hdb?Rektida* pr d.lw li!tu&wiMm.BdriftE.
rdtqnd, B4 Bde,
R. c@dr &L
kPp.@0q),
cdni Meritu@d'ic tuur otcqdr@n6n,3i-6.
Phift:hids4.vtr$ltgjddYdlbiry'
sor sckde sd.bo
7f)nqia ror d,
PUAHSFXHv,HEwcu*s,Foo
HOws l@N,
LEEPmcm,
LIM SnxHdm
HocoyOlm
M.KrDq,
J.D. r(.Eo!!i a r!tup,
E.J.Mnd.Elu,A'M6L'Be!qa
R- J3cob,.
J.
&D.q nK.n,
@00),nm!ia36ddfu.quft56c8lyqylfu
Mlij4
L., Mnrjdd
& Pce4'd.
(!00!).Phunl.ologicdiiblblofofglyco3en
*fuEnale1'TI..,d'kPbfu4l4i41
Pa.dr.@oo. ui&aPtd
tsnmsd so sd.ru srkt!.t
^ntxo towrd, NrpFr
P!iD1. (1002).Mnbuiun cdou!
Nmonun, E, & M,
thrrlor& o'3&.
N.wrliimyeeiP'.a3,93hokmi.Y' 844,a
sdQaw@.s
(ds)br"3ral
o|ib, w,N,l1t6rl E lnnidorNaa'pd
oorn,
s. (ree2). rrcld5h
rb! &nch iorbberi& aibbbr n.ubrftr /ol@r d
s.bon-rdp0rd, J.s. &
r. Ecrcn.
(20M),a4ed4eniq{fuqdpddbsl
wR. Ji
&srccrdriDi, J.c.
(1000).h.M.t W rtr
dr'
!@ 1r bti.
ddn
Ndu.
sdel s,, T'
xoaq
H.N.lml s
^r1n4q
lirlcDqT.MhL
aM,ILn
Ot9r).3i@ri4
p.'hrry.r,lriar
a/r,rrr3'.or s@{bi.c,,
E,cv!sd!
!,stuoq
e E,^.cdhm oeo, Mddde Mt
dfd.
sd@dhdPrinunw:ld.nli6c'n66
tueEgdsB.kwt6tutut@,
srrsft,
LF, a,M.strl*b
J.x.tu
oeer). rh!
hlpeo-bhdh8a ibbti
dinpdg tudo! d{Ftug
a@prqBF{n\u. tund
otRid4nd chznnry.sbootsr. 3. D. & t-