아이소발레릴-CoA
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식별자 | |
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3D 모델 (JSmol) |
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ChemSpider |
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MeSH | isovaleryl-coenzyme+A |
PubChem CID |
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CompTox Dashboard (EPA) |
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SMILES
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성질 | |
C26H44N7O17P3S | |
몰 질량 | 851.652 g/mol |
달리 명시된 경우를 제외하면, 표준상태(25 °C [77 °F], 100 kPa)에서 물질의 정보가 제공됨. ![]() ![]() ![]() 정보상자 각주 |
아이소발레릴-CoA(영어: isovaleryl-CoA) 또는 아이소발레릴 조효소 A(영어: isovaleryl coenzyme A)는 가지사슬 아미노산의 대사 경로에서의 대사 중간생성물이다.
류신의 대사 경로
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같이 보기
- 아이소발레릴-CoA 탈수소효소
각주
- ↑ Wilson JM, Fitschen PJ, Campbell B, Wilson GJ, Zanchi N, Taylor L, Wilborn C, Kalman DS, Stout JR, Hoffman JR, Ziegenfuss TN, Lopez HL, Kreider RB, Smith-Ryan AE, Antonio J (February 2013). “International Society of Sports Nutrition Position Stand: beta-hydroxy-beta-methylbutyrate (HMB)”. 《Journal of the International Society of Sports Nutrition》 10 (1): 6. doi:10.1186/1550-2783-10-6. PMC 3568064. PMID 23374455.
- ↑ Zanchi NE, Gerlinger-Romero F, Guimarães-Ferreira L, de Siqueira Filho MA, Felitti V, Lira FS, Seelaender M, Lancha AH (April 2011). “HMB supplementation: clinical and athletic performance-related effects and mechanisms of action”. 《Amino Acids》 40 (4): 1015–1025. doi:10.1007/s00726-010-0678-0. PMID 20607321.
HMB is a metabolite of the amino acid leucine (Van Koverin and Nissen 1992), an essential amino acid. The first step in HMB metabolism is the reversible transamination of leucine to [α-KIC] that occurs mainly extrahepatically (Block and Buse 1990). Following this enzymatic reaction, [α-KIC] may follow one of two pathways. In the first, HMB is produced from [α-KIC] by the cytosolic enzyme KIC dioxygenase (Sabourin and Bieber 1983). The cytosolic dioxygenase has been characterized extensively and differs from the mitochondrial form in that the dioxygenase enzyme is a cytosolic enzyme, whereas the dehydrogenase enzyme is found exclusively in the mitochondrion (Sabourin and Bieber 1981, 1983). Importantly, this route of HMB formation is direct and completely dependent of liver KIC dioxygenase. Following this pathway, HMB in the cytosol is first converted to cytosolic β-hydroxy-β-methylglutaryl-CoA (HMG-CoA), which can then be directed for cholesterol synthesis (Rudney 1957) (Fig. 1). In fact, numerous biochemical studies have shown that HMB is a precursor of cholesterol (Zabin and Bloch 1951; Nissen et al. 2000).
- ↑ Kohlmeier M (May 2015). 〈Leucine〉. 《Nutrient Metabolism: Structures, Functions, and Genes》 2판. Academic Press. 385–388쪽. ISBN 978-0-12-387784-0. 2016년 6월 6일에 확인함.
Energy fuel: Eventually, most Leu is broken down, providing about 6.0kcal/g. About 60% of ingested Leu is oxidized within a few hours ... Ketogenesis: A significant proportion (40% of an ingested dose) is converted into acetyl-CoA and thereby contributes to the synthesis of ketones, steroids, fatty acids, and other compounds
Figure 8.57: Metabolism of L-leucine
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아미노산 (K)
→아세틸-CoA
리신→ | |
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류신→ |
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트립토판→알라닌→ |
아미노산 (G)
G→피루브산→시트르산 |
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G→글루탐산→ α-케토글루타르산 |
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G→프로피오닐-CoA→ 석시닐-CoA |
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G→푸마르산 |
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G→옥살아세트산 |
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시스테인 대사 |
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- 생체분자: 탄수화물
- 당단백질
- 글리코사이드
- 지질
- 지방산 / 지방산 대사 중간생성물
- 인지질
- 스핑고지질
- 스테로이드
- 에이코사노이드
- 단백질
- 단백질생성성 아미노산 / 아미노산 대사 중간생성물
- 핵산
- 구성 성분
- 뉴클레오타이드 대사 중간생성물
- 테트라피롤
- 헴 대사 중간생성물
- 알코올