Haros Monica, Bielecka Maria, Sanz Yolanda
EU Centre of Excellence CENEXFOOD, Division of Food Science, Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-747 Olsztyn, Poland.
FEMS Microbiol Lett. 2005 Jun 15;247(2):231-9. doi: 10.1016/j.femsle.2005.05.008.
Phytase activity has been detected for the first time in Bifidobacterium spp. These bacteria were able to dephosphorylate phytic acid (myo-inositol hexaphosphate, IP(6)) and generate several myo-inositol phosphate intermediates (IP(3)-IP(5)). B. globosum and B. pseudocatenulatum were optimally active at neutral-alkaline pH and B. adolescentis, B. angulatum and B. longum at acid pH. B. pseudocatenulatum showed the highest levels of phytase activity. This species produced maximum activity in the exponential phase of growth and when fructo-oligosaccharides were used as carbon source in the culture medium. The potential role of phytase activity from Bifidobacterium spp. in the reduction of the antinutritional properties of IP(6) is discussed.
首次在双歧杆菌属中检测到植酸酶活性。这些细菌能够使植酸（肌醇六磷酸，IP(6)）去磷酸化，并生成几种肌醇磷酸中间产物（IP(3)-IP(5)）。球形双歧杆菌和假链状双歧杆菌在中性至碱性pH条件下活性最佳，青春双歧杆菌、角双歧杆菌和长双歧杆菌在酸性pH条件下活性最佳。假链状双歧杆菌显示出最高水平的植酸酶活性。该菌株在生长指数期以及在培养基中使用低聚果糖作为碳源时产生最大活性。讨论了双歧杆菌属的植酸酶活性在降低IP(6)抗营养特性方面的潜在作用。
