• 제목/요약/키워드: Homologue

검색결과 222건 처리시간 0.018초

Molecular Cloning of a Defensin Homologue Gene of a Novel Family Member from the Firefly, Pyrocoelia rufa

  • Lee, Kwang-Sik;Park, Hye-Jin;Kim, Seong-Ryul;Lee, Sang-Mong;Sohn, Hung-Dae;Jin, Byung-Rae
    • International Journal of Industrial Entomology and Biomaterials
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    • 제3권1호
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    • pp.57-62
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    • 2001
  • A cDNA encoding the defensin homologue of a novel family member was isolated from the cDNA library of the firefly,Pyrocoelia rufa. Sequence analysis of the cDNA encoding the defensin homologue of P. rufa resulted that the 165 bp cDHA has an open reading frame of 55 amino acid residues. The deduced amino acid sequences of the defensin homologue gene from P. rufa showed identity to known mammalian defensins. Also 6 cystein residues in the P. rufa defensin homologue gene were conserved in the same position as those of known mammalian defensins. The result suggested that P. rufa defensin homologue is a novel member of the insect defensin family. Southern blot analysis suggests that there may be a single copy number of the P.rufa defensin homologue gene and their fat body-specific expression pattern at the transcriptional level was confirmed by Northern blot analysis.

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지역별 소나무잎과 토양에 침착된 PCDD/Fs 특성 (Characteristics of PCDD/Fs Deposited on Regional Pine Needles and Soil)

  • 천만영;김태욱
    • 대한환경공학회지
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    • 제27권11호
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    • pp.1153-1161
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    • 2005
  • 서로 다른 장소에서 소나무잎과 토양을 채취하여 그 중에 침착된 PCDD/Fs의 농도와 homologue별 농도분포 특성에 대하여 연구하였다. 소나무잎중 PCDD/Fs homologue 농도분율은 소나무잎중 ${\sum}PCDD/Fs$ 농도가 낮은 지역일수록 염소치환수가 많은 homologue의 농도분율은 낮아지고 염소치환수가 적은 homologue의 농도분율은 높아지는 경향을 보였다. 그러나 토양중 PCDD/Fs homologue 농도분율은 소나무잎중 ${\sum}PCDD/Fs$ 농도가 낮은 지역일수록 염소치환수가 적은 homologue의 농도분율은 감소하였고 염소치환수가 많은 homologue의 농도분율은 증가하는 경향을 보였다. 그리고 소나무잎에 침착된 PCDD/Fs 농도는 대기중 PCDD/Fs 농도에 의존하지만 토양에 침착된 PCDD/Fs 농도는 대기중 PCDD/Fs 농도와 동시에 토양중 유기물의 농도에도 의존하였다. 그러므로 대기중 PCDD/Fs의 passive sampler로는 토양보다 소나무잎이 더 적합하였다.

Molecular Cloning of a cDNA Encoding a Cathepsin D Homologue from the Mulberry Longicorn Beetle, Apriona germari

  • Kim, Seong-Ryul;Yoon, Hyung-Joo;Park, Nam-Sook;Lee, Sang-Mong;Moon, Jae-Yu;Jin, Byung-Rae;Sohn, Hung-Dae
    • International Journal of Industrial Entomology and Biomaterials
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    • 제3권2호
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    • pp.121-126
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    • 2001
  • A cDNA encoding a cathepsin D homologue was cloned from a cDNA library of the mulberry longicorn beetle, Apriona germari. Sequence analysis of the cDNA encoding the cathepsin D homologue of A. germari revealed that the 1,158 bp cDNA has an open reading frame of 386 amino acid residues. The deduced protein sequence of the A. germari cathepsin D homologue shows high homology with cathepsin D in insects, Aedes aegypti (68.2% amino acid similarity) and Drosophila melanogaster (67.2% amino acid similarity). Two aspartic residues and six cystein residues in the A. germari cathepsin D homologue are present at identical locations in all of the other catepsins D. Unlike cathepsins D in two insect species, A. gemari cathepsin D homologue appears to have two putative glycosylation sites, rather than one. Phylogenetic analysis revealed the A. germari cathepsin D homologue is more closely related to insect cathepsins D than to the other animal cathepsins D. Northern blot analysis suggests that A. germari cathepsin D homologue gene is expressed in most if not all, body tissues.

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Heterologous Expression of Streptomyces albus Genes Linked to an Integrating Element and Activation of Antibiotic Production

  • Kwon, Hyung-Jin;Lee, Soon-Youl;Hong, Soon-Kwang;Park, Uhn-Mee;Suh, Joo-Won
    • Journal of Microbiology and Biotechnology
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    • 제9권4호
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    • pp.488-497
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    • 1999
  • Probing Streptomyces albus ATCC 21838 chromosomal DNA with a proline tRNA sequence resulted in an isolation of a putative integrating element in the 6.4-kb EcoRI fragment. It was found that Streptomyces lividans TK-24 transformed with a cloned DNA fragment on a multicopy plasmid, produced a higher level of spore pigment and mycelial red pigment on a regeneration agar. Furthermore, the transformant S. lividans TK-24 produced a markedly increased level of undecylprodigiosin in a broth culture. A nucleotide sequence analysis of the cloned region revealed several open reading frames homologous to the integrases of integrating plasmids or temperate bacteriophages, signal-transducing regulatory proteins with a conserved ATP-binding domain, oxidoreductases ($\beta$-ketoacyl reductase), and an AraC-like transcriptional regulator. To examine the effect on antibiotic production, each coding region was overexpressed separately from the other genes in the region in S. lividans TK-24 with; pJHS3044 for the expression of the signal-transducing regulatory protein homologue, pJHS3045 for the homologue of oxidoreductase, and pJHS3051 for the homologue of the AraC-like transcriptional regulator. Phenotypic studies of S. lividans TK-24 strains harboring plasmids for the overexpression of individual genes suggested the following effects of the genes on antibiotic production: The oxidoreductase homologue stimulated the production of actinorhodin and undecylprodigiosin, which was influenced by the culture conditions; the homologue of the AraC-like transcriptional regulator was the most effective factor in antibiotic production within all the culture conditions tested; the signal-transducing regulatory protein homologue repressed the effect due to the homologue of the AraC-like transcriptional regulator, however, the antibiotic production was derepressed upon entering the stationary phase.

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막-효소 반응기를 이용한 Cyclodextrin의 생산 (Production of Cyclodextrin using Membrane-Enzyme Reactor)

  • 홍준기;염경호
    • 멤브레인
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    • 제8권3호
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    • pp.170-176
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    • 1998
  • 가용성 전분으로부터 CGTase 효소에 의한 Cyclodextrin(CD) 동족체의 생산 실험을 dead-end형 막모듈을 설치한 막-효소 반응기에서 수행하였다. 회분 반응기에서의 CD 동족체 생산시 생산물 저해작용 및 생산된 CD의 다른 환원당으로의 분해에 의해 반응시간에 따른 전분의 CD 동족체로의 총 전환율이 최대 45%를 나타내었다가 급격히 감소하였다. 반면 분획분자량 10,000 달톤의 분리막이 설치된 막-효소 반응기에서의 CD 동족체 생산시 CD 동족체를 생산 즉시 반응기로부터 막을 통해 연속 분리할 수 있어 총 전환율이 35%로 일정하게 유지되었다. 10% 전분용액 및 2 atm 조작압력하에서 막-효소 반응기를 24시간 운전하였을 때 CD 동족체의 누적 생산량은 약 3.7 kg/m$^2$이었다.

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소각잔사 중에 함유된 클로로벤젠과 클로로페놀의 열분해 거동 (The Behavior of Chlorobenzenes and Chlorophenols in Fly Ash by Thermal Treatment)

  • 심영숙;이우근;김진범
    • 한국대기환경학회지
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    • 제14권4호
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    • pp.293-302
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    • 1998
  • This study was performed to investigate the behavior of chlorobenzenes (CIBZS) and chlorophenols (CIPhs) in a thermally treated MSWI fly ash. The experiment was carried out in a fixed bed reactor at the temperature range of 300~$600^{\circ}C$. Reaction time range was between 30 and 120 minutes, and NB and 02 gases were used as carrier gas. The decomposition rate of CIBZS was more affected by reaction time than by the reaction temperature. The decomposition rate of CIPhs was affected by both parameters. Decomposition rate of CIBZS and CIPhs reached 80.4% and 96.6% at $600^{\circ}C$, 120 min, respectively. Considering the effect of O2 content, decomposition rate of CIBZS and CIPhs was the highest at 10% of O2 content. Declorination and decomposition reactions Pere investigated by analyzing homologue distribution. Higher chlorinated CIBZS and CIPhs homologue decreased but lower chlorinated compounds increased with the increase of temperature. Effect of O2 on the homologue distribution of these compounds was not clear in the range of our experiment conditions.

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소나무잎과 토양에 침착된 PCDD/Fs 특성 (Characteristics of PCDD/Fs Deposited on Pine Needles and Soil)

  • 천만영;여현구
    • 한국환경농학회지
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    • 제24권3호
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    • pp.280-288
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    • 2005
  • 대기중 PCDD/Fs가 소나무잎과 토양에 침착되는 특징에 대하여 연구하였다. 1) 토양과 소나무잎에 침착된 PCDD/Fs는 토양중 농도가 소나무잎중 농도보다 ${\Sigma}PCDDs$는 7.4배, ${\Sigma}PCDFs$는 2.3배, 그리고 ${\Sigma}PCDD/Fs$는 5.4배 더 높았다. 2) 토양/소나무잎 농도비를 homologue 별로 비교한 결과 PCDD/Fs homologue의 LogKoa 값의 크기 변화와 동일한 경향을 보였다. 3) 각 congener의 ${\Sigma}PCDD/Fs$ 농도에 대한 농도 분율은 염소치환수가 적은 경우(tetra-에서 hexa-까지)에는 소나무잎에서 높고, 염소치환수가 많은 경우(hepta-와 octa-)에는 토양에서 더 높았다. 4) 소나무잎에는 염소치환수가 적은 PCDD/Fs homologue가, 토양에는 염소치환수가 많은 PCDD/Fs homologue가 주로 누적침착되었다.

열공정에서 페놀류로부터 Polychlorinated dibenzo-p-dioxins(PCDDs)과 Polychlorinated dibenzofurans(PCDFs)의 생성에 관한 연구[I] (A Study of Polychlorinated dibenzo-p-dioxins(PCDDs) and Polychlorinated dibenzofurans(PCDFs) Formation from Phenols in Thermal Process[I])

  • 류재용;서정민;박정호
    • 대한환경공학회지
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    • 제28권5호
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    • pp.511-521
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    • 2006
  • 페놀류 전구물질로부터 형성된 polychlorinated dibenzo-p-dioxins(PCDDs)와 dibenzofurans(PCDFs)의 모든 동족체와 이성질체의 경향을 페놀과 19개의 염화페놀류의 분포를 이용하여 연구하였다. 실험은 $400^{\circ}C$(particle-mediated formation)와 $600{\sim}700^{\circ}C$(gas-phase formation)에서 각각 행하여 졌으며, 운반가스로 사용된 가스의 조성은 92%의 질소와 8%의 산소를 사용하였다. 염소기가 없는 dibenzo-p-dioxin(DD)와 dibenzofuran(DF)를 포함한 모든 종류의 PCDDs와 PCDFs의 동족체와 이성질체들이 20개의 페놀류를 혼합하여 사용한 본 실험으로부터 얻어졌다. 가스상 실험은 PCDFs가 많이 생성하였고, 입자상 실험에서는 PCDDs를 많이 생성 하였다. 가장 많이 생성된 동족체는 각각 DD와 DF였으며, 염소기의 숫자가 증가할수록, 동족체의 생성량은 감소하였다. 하지만 가스상과 입자상 실험에서 얻어진 PCDDs와 PCDFs의 동족체와 이성질체의 분포는 거의 항상 일정하였다. 고농도로 존재하는 페놀과 적은수의 염소기를 가지고 있는 염화 페놀류의 농도가 가스상과 입자상에서 발생하는 PCDDs와 PCDFs의 분포에 아주 중요한 역활을 하였다.

Molecular Cloning of the Sec61p ${\gamma}$ Subunit Homologue Gene from the Mole Cricket, Gryllotalpa orientalis

  • Kim, Iksoo;Lee, Kwang-Sik;Jin, Byung-Rae;Kim, Eun-Sun;Lee, Heui-Sam;Ahn, Mi-Young;Sohn, Hung-Dae;Ryu, Kang-Sun
    • International Journal of Industrial Entomology and Biomaterials
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    • 제5권1호
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    • pp.73-77
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    • 2002
  • The Sec61 trimeric complex ($\alpha$,$\beta$, and ${\gamma}$ subunits) is one of the Sec-complex responsible for post-translational protein translocation across the endoplasmic reticulum membrane in diverse organisms. In this study, a cDNA encoding the Sec61p ${\gamma}$ subunit homologue was isolated from the cDNA library of the mole cricket, Gryllotalpa orientalis. Sequence analysis of a 442-bp cDNA clone showed it to contain an open reading frame of 68 amino acid residues consisted of 204-bp. The homologues of the gene were found in the GenBank database in a diverse organism including insect, mammals, fungi, and plants. The deduced amino acid sequence of Sec61p ${\gamma}$ subunit homologue of the mole cricket showed the highest homology to the gene of the singly known insect, Drosophila melanogester (93% identity), and the least homology to that of the baker's yeast, Saccharomyces cerevisiae (37.2%). Phylogenetic analysis also confirmed a close relationship between the insect Sec61p ${\gamma}$ subunit homologues of G. orientalis and D. melanogester. Hydropathy analysis of the cricket mole and published other data suggested that the hydrophobic segment close to C-terminus is predicted to be the putative membrane anchor, Multiple alignment of the Sec61p ${\gamma}$ subunit homologue among several organisms showed the presence of several conserved domains including the conserved proline at position 28.

Bacillus lentimorbus WJ5의 분비 전용 Srb Homologue 발현과 항진균 활성 (Expression of Secretion-dedicated Srb Homologue and Antifungal Activity of Bacillus lentimorbus WJ5)

  • 장유신;이영근;김재성;조규성;장병일
    • 미생물학회지
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    • 제39권3호
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    • pp.135-140
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    • 2003
  • Bacillus sp.는 다량의 효소와 기능성 펩타이드들을 세포외로 분비하는 것으로 알려져 있다. Signal recognition particle (SRP)과 SRP receptor는 세포외 분비 단백질의 이동에 있어서 중심적 역할을 담당한다. B. lentimorbus WJ5의 DNA microarray 결과, 감마선 조사로 유도된 항진균 활성 결핍 돌연변이체인 WJ5m12에서 B. subtilis srb homologue (srbL)의 발현이 감소되는 것을 관찰할 수 있었다. SRP receptor와 항진균 활성 사이의 연관성을 고찰하기 위하여 B. lentimorbus WJ5의 srbL을 PCR로 증폭하여 pQE30 vector에 클로닝 하였으며, B. lentimorbus WJ5m12에 형질전환 시켰다. 형질전환된 B. lentimorbus WJ5m12::srbL은 항진균 활성이 복원되었다. 이차원 전기영동 결과, 수 종의 세포외 분비 단백질의 전구체들이 항진균 활성 결핍 돌연변이 균주에서 축적되었고 B.lentimorbus WJ5m12::srbL에서는 야생형 균주의 단백질 수준까지 감소되는 현상을 관찰할 수 있었다. 이는 B.lentimorbus WJ5의 항진균 활성 관련 물질의 이동에 있어서 srbL이 중요한 역할을 한다는 것을 암시한다.