食品科学

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乳酸菌盐溶性蛋白培养物中血管紧张素转化酶抑制活性肽的测定及分离

赵俊良1,卢海鹏1,芒 来2,金 山1,*   

  1. 1.内蒙古农业大学兽医学院,农业部动物疾病临床诊疗技术重点实验室,内蒙古 呼和浩特 010018;
    2.内蒙古农业大学动物科学学院,内蒙古 呼和浩特 010018
  • 出版日期:2016-05-15 发布日期:2016-05-18

Separation and Determination of Angiotensin Converting Enzyme Inhibitory Peptide from Salt-Soluble Protein Solution Fermented with Lactic Acid Bacteria

ZHAO Junliang1, LU Haipeng1, MANG Lai2, JIN Shan1,*   

  1. 1. Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease, Ministry of Agriculture,
    College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010018, China;
    2. College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Online:2016-05-15 Published:2016-05-18

摘要:

将16 株乳酸菌用MRS液体培养基3 代继代培养后,离心,并用灭菌的生理盐水制成乳酸菌悬浮液,接种于远东多线鱼肉盐溶性蛋白溶液(salt-soluble protein,SSP),对其代谢产物进行血管紧张素转化酶(angiotensinconverting enzyme,ACE)抑制活性测定,筛选出ACE抑制活性较高的Pediococcus acidilactici ID7菌株(ACE抑制率为47.6%)和Lactobacillus plantarum 6214菌株(ACE抑制率为40.6%)。利用高效液相色谱(high performanceliquid chromatography,HPLC)对Pediococcus acidilactici ID7的盐溶性蛋白培养代谢物进行色谱分析,获得了两个峰,其相应成分对ACE抑制的IC50分别为1.21 μg/mL和1.07 μg/mL,利用凝胶过滤HPLC法对出现较高的ACE抑制活性峰的成分进行色谱纯化,获得了ACE抑制率为26.67%,分子质量为586.7 D以下的ACE抑制多肽。

关键词: 乳酸菌, 血管紧张素转化酶, 盐溶性蛋白, 高效液相色谱法

Abstract:

Sixteen lactic acid bacteria (LAB) strains were cultured for 3 generations in MRS liquid medium, centrifuged,
prepared into LAB suspension with sterilized physiological saline, and then inoculated in salt-soluble protein (SSP) solution
from arabesque greenling. Through determining angiotensin converting enzyme (ACE) inhibitory peptide from metabolites,
Pediococcus acidilactici ID7 and Lactobacillus plantarum 6214 displayed high ACE inhibitory activity, with a percentage
inhibition of 47.6% and 40.6%, respectively. Higher ACE inhibitory activity in SSP solution fermented with Pediococcus
acidilactici ID7 was determined by high performance liquid chromatograph (HPLC). Meanwhile, two peaks after HPLC
purification were achieved, which showed IC50 of 1.21 μg/mL and 1.07 μg/mL, respectively. The peak with higher ACE
inhibitory activity was purified by gel filtration. The obtained ACE inhibitory peptide showed percentage inhibition of
26.67% and molecular weight less than 586.7 D.

Key words: lactic acid bacteria (LAB), angiotensin converting enzyme (ACE), salt-soluble protein (SSP), high performance liquid chromatography (HPLC)

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