%0 Journal Article
%T Sodium ion transportation system and its possible mechanisms in Bacteria<br>细菌钠离子输出系统的类型及其可能机制
%A YANG Li-fu
%A ZHAO Bai-suo
%A YANG Su-sheng
%A <br>杨礼富
%A 赵百锁
%A 杨苏声
%J 微生物学报
%D 2007
%I 
%X Sodium ion with high concentration is toxic to living cells, and microorganisms adapt to the environment containing high concentration of salt by the strategies of salt-in-cytoplasm and compatible solutes. The Na~ extrusion system plays important roles in maintaining cytoplasmic Na~ homeostasis and pH level in microbial cells. Two possible mechanisms of Na~ circulation across the cytoplasmic membrane have been proposed, namely primary Na~ pump and secondary Na~ /H~ antiporter. Primary sodium pumps coupled the extrusion of Na~ to respiration, and the activity of which was insensitive to uncoupler CCCP (carbonyl-cyanide m-chlorophenylhydrazone). There were two types of secondary Na~ /H~ antiporters-encoding genes designated single gene and multiple subunits, respectively. The types of transportation systems for Na~ , possible mechanisms of Na~ extrusion, and projects for further study in bacteria are reviewed.
%K bacteria
%K sodium ion transportation
%K primary Na~
%K pump
%K secondary Na~ /H~
%K antiporter<br>细菌
%K 钠离子输出
%K 初级钠泵
%K 次级钠泵
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=A3C6BA55AB623B90FA9104CFFC826F3C&aid=ED2CC2FD33A6F13BFCFBA103092CC6CB&yid=A732AF04DDA03BB3&vid=F4B561950EE1D31A&iid=B31275AF3241DB2D&sid=CEBE8025959B35C7&eid=5348E91DA94080DE&journal_id=0001-6209&journal_name=微生物学报&referenced_num=0&reference_num=34