密封-20℃干燥保存。
Analysis Note Protein determined by biuret.
Unit Definition One unit will hydrolyze 1.0 μmole of N-acetyl-L-methionine per hr at pH 7.0 at 25 °C.
Biochem/physiol Actions The enzyme hydrolyzes a variety of N-acyl-L-amino acids and dehydropeptides containing dehydroalanyl residues. N-acyl-D-amino acids and dehydropeptides other than dehydroalanine are not hydrolyzed. The following compounds are hydrolyzed by acylase I: chloroacetyl-L-amino acids, L-leucinamide, chloroacetyldehydroalanine, glycyl-L-amino acids, and glycyldehydroalanine. Aminoacylase is widely used as a reagent to resolve amino acid racemates. The Km for acyl amino acids have been reported in the literature: Ac-L-Met (0.99 mM), Ac-L-Glu (10.2 mM), and Ac-L-Phe (5.5 mM).
Aminoacylase from pig kidney is activated by Zn2+ and Co2+ and inhibited by SH blocking reagents, disulfide reducing reagents, N-tosyl-L-alanine,
DL-norleucine, and N-tosyl-L-lysine chloromethylketone.
1.疏水參數(shù)計(jì)算參考值(XlogP):7.6
2.氫鍵供體數(shù)量:3
3.氫鍵受體數(shù)量:3
4.可旋轉(zhuǎn)化學(xué)鍵數(shù)量:11
5.互變異構(gòu)體數(shù)量:12
6.拓?fù)浞肿訕O性表面積69.8
7.重原子數(shù)量:37
8.表面電荷:0
9.復(fù)雜度:726
10.同位素原子數(shù)量:0
11.確定原子立構(gòu)中心數(shù)量:0
12.不確定原子立構(gòu)中心數(shù)量:0
13.確定化學(xué)鍵立構(gòu)中心數(shù)量:0
14.不確定化學(xué)鍵立構(gòu)中心數(shù)量:0
15.共價(jià)鍵單元數(shù)量:1
1. 性狀:淺紅色或淺黃色凍干粉。
2. 密度(g/mL,25/4℃):未確定
3. 相對(duì)蒸汽密度(g/mL,空氣=1):未確定
4. 熔點(diǎn)(oC):未確定
5. 沸點(diǎn)(oC,常壓):未確定
6. 沸點(diǎn)(oC, 5.2kPa):未確定
7. 折射率:未確定
8. 閃點(diǎn)(oC):未確定
9. 比旋光度(o ):未確定
10. 自燃點(diǎn)或引燃溫度(oC):未確定
11. 蒸氣壓(kPa,25oC):未確定
12. 飽和蒸氣壓(kPa,60oC):未確定
13. 燃燒熱(KJ/mol):未確定
14. 臨界溫度(oC):未確定
15. 臨界壓力(KPa):未確定
16. 油水(辛醇/水)分配系數(shù)的對(duì)數(shù)值:未確定
17. 爆炸上限(%,V/V):未確定
18. 爆炸下限(%,V/V):未確定
19. 溶解性:溶于水,最適pH值7.0-7.5(豬腎、淀粉酶)或7-8(米曲酶)
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