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The Function of TerC Proteins in Metal Homeostasis
The Function of TerC Proteins in Metal Homeostasis
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151319
- ISBN
- 9798382841731
- DDC
- 576
- 저자명
- He, Bixi.
- 서명/저자
- The Function of TerC Proteins in Metal Homeostasis
- 발행사항
- [Sl] : Cornell University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 195 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Helmann, John.
- 학위논문주기
- Thesis (Ph.D.)--Cornell University, 2024.
- 초록/해제
- 요약Bacillus subtilis is a Gram-positive model organism found worldwide in environments with different nutrients and trace elements. To adapt to these changing growth conditions, B. subtilis has a high capacity for protein secretion and employs various systems to maintain the intracellular metal levels. Manganese is an important transition metal and functions as the cofactor in different metalloenzymes. Cytosolic Mn-requiring enzymes can acquire metals from buffered intracellular pools, but the mechanisms of metalation of exported enzymes are unclear. Here, we show that widely conserved TerC family proteins function in metalation of exoenzymes during or after their secretion process through the general secretion (Sec-dependent) pathway. B. subtilis cells lacking MeeF and MeeY have a reduced capacity for protein secretion and a dramatically reduced level of manganese in the secreted proteome. In the absence of TerC proteins, misfolded or unfolded proteins may stall the secretion translocon (SecYEG). The membrane protease FtsH, which can degrade dysfunctional SecY, is essential for cell viability. MeeF and MeeY can also influence the efficient function of Mn-dependent lipoteichoic acid synthase LtaS by metalation of Mn into its extracytoplasmic active site. Overall, MeeF and MeeY have functions in the co-translocational metalation of Mn-requiring membrane and extracellular enzymes (Chapter 2). The jamming of translocon caused by a lack of TerC proteins MeeF and MeeY may influence other cellular processes in B. subtilis. We provide evidence that MeeF and MeeY are involved in the swarming, sporulation, and natural competence. The double mutant meeFmeeY has defective swarming motility and decreased flagella production. Besides, cells lacking MeeF and MeeY in CU1065 strain background show defects in sporulation and a lower transformation efficiency. These defects indicate that clients other than LtaS require TerC proteins for metalation, and the impaired secretion in the cells without TerC proteins can cause pleiotropic phenotypes in B. subtilis (Chapter 3). Finally, we discuss the strategies employed by bacterial cells to metalate membrane-bound and secreted metalloenzymes which are involved in cell envelope homeostasis (Chapter 4).
- 일반주제명
- Microbiology
- 일반주제명
- Cellular biology
- 일반주제명
- Molecular biology
- 키워드
- Metalloenzymes
- 기타저자
- Cornell University Microbiology
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151319
■006m o d
■007cr#unu||||||||
■020 ▼a9798382841731
■035 ▼a(MiAaPQ)AAI31238951
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a576
■1001 ▼aHe, Bixi.▼0(orcid)0000-0002-2796-7620
■24510▼aThe Function of TerC Proteins in Metal Homeostasis
■260 ▼a[Sl]▼bCornell University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a195 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Helmann, John.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2024.
■520 ▼aBacillus subtilis is a Gram-positive model organism found worldwide in environments with different nutrients and trace elements. To adapt to these changing growth conditions, B. subtilis has a high capacity for protein secretion and employs various systems to maintain the intracellular metal levels. Manganese is an important transition metal and functions as the cofactor in different metalloenzymes. Cytosolic Mn-requiring enzymes can acquire metals from buffered intracellular pools, but the mechanisms of metalation of exported enzymes are unclear. Here, we show that widely conserved TerC family proteins function in metalation of exoenzymes during or after their secretion process through the general secretion (Sec-dependent) pathway. B. subtilis cells lacking MeeF and MeeY have a reduced capacity for protein secretion and a dramatically reduced level of manganese in the secreted proteome. In the absence of TerC proteins, misfolded or unfolded proteins may stall the secretion translocon (SecYEG). The membrane protease FtsH, which can degrade dysfunctional SecY, is essential for cell viability. MeeF and MeeY can also influence the efficient function of Mn-dependent lipoteichoic acid synthase LtaS by metalation of Mn into its extracytoplasmic active site. Overall, MeeF and MeeY have functions in the co-translocational metalation of Mn-requiring membrane and extracellular enzymes (Chapter 2). The jamming of translocon caused by a lack of TerC proteins MeeF and MeeY may influence other cellular processes in B. subtilis. We provide evidence that MeeF and MeeY are involved in the swarming, sporulation, and natural competence. The double mutant meeFmeeY has defective swarming motility and decreased flagella production. Besides, cells lacking MeeF and MeeY in CU1065 strain background show defects in sporulation and a lower transformation efficiency. These defects indicate that clients other than LtaS require TerC proteins for metalation, and the impaired secretion in the cells without TerC proteins can cause pleiotropic phenotypes in B. subtilis (Chapter 3). Finally, we discuss the strategies employed by bacterial cells to metalate membrane-bound and secreted metalloenzymes which are involved in cell envelope homeostasis (Chapter 4).
■590 ▼aSchool code: 0058.
■650 4▼aMicrobiology
■650 4▼aCellular biology
■650 4▼aMolecular biology
■653 ▼aBacillus subtilis
■653 ▼aProtein secretion
■653 ▼aMetalloenzymes
■653 ▼aExtracellular enzymes
■690 ▼a0410
■690 ▼a0379
■690 ▼a0307
■71020▼aCornell University▼bMicrobiology.
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161166▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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