>TIGR00831 a_cpa1 Na+/H+ antiporter; InterPro: IPR004705 Na^+/H^+ exchange proteins eject protons from cells, effectively eliminating excess acid from actively metabolising cells. Na^+/H^+ exchange activity is also crucial for the regulation of cell volume, and for the reabsorption of NaCl across renal, intestinal, and other epithelia. These antiports exchange Na^+ for H^+ in an electroneutral manner, and this activity is carried out by a family of Na^+/H^+ exchangers, or NHEs, which are known to be present in both prokaryotic and eukaryotic cells. In mammalian cells, Na^+/H^+ exchange activity is found in both the plasma membrane and inner mitochondrial membrane. To date, six mammalian isoforms have been identified (designated NHE1-NHE6) , . These exchangers are highly-regulated (glyco)phosphoproteins, which, based on their primary structure, appear to contain 10-12 membrane-spanning regions (M) at the N-terminus and a large cytoplasmic region at the C-terminus. The transmembrane regions M3-M12 share identity with other members of the family. The M6 and M7 regions are highly conserved. Thus, this is thought to be the region that is involved in the transport of sodium and hydrogen ions. The cytoplasmic region has little similarity throughout the family. There is some evidence that the exchangers may exist in the cell membrane as homodimers, but little is currently known about the mechanism of their antiport . This group is specific for the bacterial members of this family. .

Probab=99.75 E-value=6.8e-16 Score=126.39 Aligned_cols=265 Identities=18% Similarity=0.177 Sum_probs=179.3 Q ss_pred HHHHHCCCCHHHHHHHHHHHHCCHHCC-CCCCHHHHHHHHHHHHHHHHHHHHHCCCHHHHHHHCCHHHHHHHHHHHHHH- Q ss_conf 999870888679999999962741038-558478999999999999998825416889998415158899899999999- Q gi|254780924|r 16 AIANRCRLPTLIGYLVAGILVGPRTPG-FVASQSLVPALAEIGIILLMFGVGLHFSVKDLISVRGIALPGALIQIILGT- 93 (609) Q Consensus 16 ~la~rl~lP~i~~~il~GillGp~~l~-~i~~~~~l~~l~~lgl~~llF~~Gleld~~~l~~~~~~~~~~~~~~~~~~~- 93 (609) T Consensus 15 v~v~~~r~p~p~~lil~G~llgl~~~~~~V~~d~E~vl--~lFlPplLf~~~mnt~~rE~ren~r~I~~~a~~lVvvT~v 92 (541) T TIGR00831 15 VLVKRYRVPLPVLLILAGALLGLAGLLLEVELDREVVL--LLFLPPLLFEEAMNTDLRELRENLREIVLLALALVVVTVV 92 (541) T ss_pred EEEEEEECCHHHHHHHHHHHHHHHHCCCCCCCCCCEEE--HHHCCHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHH T ss_conf 56556645657999999999976304677222750220--2031178889850788589988215999999988998775 Q ss_pred HHHHHHHH-HHCCCHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCHHHHHHHHHHHHHHHHHHHHHHHHHHC-CCCCC Q ss_conf 99999999-96788689999999997423899998765655411440578989987777899999999998613-44433 Q gi|254780924|r 94 ALGALMGM-VMGWSLGGSVVFGLALSIASTVVLLKALQENRILETDRGKIAVGWLIVEDLIIVLALVLIPAAAT-NYSAE 171 (609) Q Consensus 94 ~~~~~~~~-~lg~~~~~all~g~~l~~ts~~vv~~~l~~~~~~~~~~g~~~~~~~~~~Di~~i~~l~il~~~~~-~~~~~ 171 (609) T Consensus 93 ~vgf~~~Wv~lGipl~~A~~lgAvlSpTDavav~g~~k~~r~Pk-k~~~~l~GEsl~NDg~alV~fa~avava~G~~~f~ 171 (541) T TIGR00831 93 AVGFSLRWVVLGIPLALALVLGAVLSPTDAVAVAGLVKEIRLPK-KLLIVLEGESLLNDGAALVVFAVAVAVALGKAVFD 171 (541) T ss_pred HHHHHHHHHHCCHHHHHHHHHHHHHCCCHHHHHHHHHCCCCCHH-HHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCCC T ss_conf 46667766741736899999987617320899999841344237-88999722245642899999999999971532110 Q ss_pred CHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCCCCEEEEEECCCCCHHHHHHHCCCC-CHHHHHHHHHHHHHHHHHHH Q ss_conf 01356789999887653210147999999984101000010003445438776420356-73689999999999999988 Q gi|254780924|r 172 PSSMTHPWTSFITQQMGFEVGMPGLIMITLLKVVAFIGVMLIFGRRVIPWILHMIFYTG-SRELFRLGVLAIALGFAYGS 250 (609) Q Consensus 172 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-~~~~~~~~~l~~~~~~~~~~ 250 (609) T Consensus 172 p~~a~~~F~vv-----------------~~GGi~a-----Gl~Vg~L~~RslrfllR~~iD~pl~eial~~l~pfa~fll 229 (541) T TIGR00831 172 PAAAVVEFVVV-----------------AVGGILA-----GLVVGYLVTRSLRFLLRAKIDEPLVEIALLLLAPFAAFLL 229 (541) T ss_pred HHHHHHHHHHH-----------------HHHHHHH-----HHHHHHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHH T ss_conf 57889989998-----------------8889999-----9999999999999998613672789999999999999999 Q ss_pred HHHHHHHHHHHHHHHHHHCCCCCH------HHHH--HHHHHHHHHHHHHHHHHHHHHHCCHHH Q ss_conf 874110024666664222027614------5689--999976689999999988653114798 Q gi|254780924|r 251 SKLFGVSLSLGAFFAGMILAESEL------SQSA--AQESLPLRDAFSVLFFISVGMMFNPDI 305 (609) Q Consensus 251 ~~~~g~s~~lgaf~aG~~l~~~~~------~~~~--~~~~~~~~~~~~~~fFv~iG~~l~~~~ 305 (609) T Consensus 230 Ae~~~~SGv~Avvaagl~lt~~G~~~~~~~~~Rl~a~~fW~~~~Fl~Ng~~f~l~Gvq~pg~i 292 (541) T TIGR00831 230 AERLKVSGVVAVVAAGLVLTRVGRDFSISAASRLRALDFWSVLVFLVNGIVFVLVGVQLPGII 292 (541) T ss_pred HHHHCCCHHHHHHHHHHHHHCCCCCEEECHHHHHHHHHHHHHHHHHHHHHHHHHHHCCHHHHH T ss_conf 978087678899999898705687303238778879768999999998899899860314799

HHsearch alignment for GI: 254780924 and conserved domain: TIGR00831