>TIGR00746 arcC carbamate kinase; InterPro: IPR003964 The arginine dihydrolase (AD) pathway is found in many prokaryotes and some primitive eukaryotes. The three- enzyme anaerobic pathway breaks down L-arginine to form 1 mol of ATP, carbon dioxide and ammonia. In simpler bacteria, the first enzyme, arginine deiminase, can account for up to 100f total cell protein . Carbamate kinase is involved in the last step of the AD pathway, converting carbamoyl phosphate and ADP into ammonia, carbon dioxide and ATP . The second step of the pathway involves the degradation of L-citrulline to carbamoyl phosphate and L-ornithine, using ornithine carbamoyltransferase . The crystal structure of Enterococcus faecium carbamate kinase has been determined to 2.8A resolution . The enzyme exists as a homodimer of two 33kDa subunits. The hallmark of the dimer is a 16-stranded beta-sheet, surrounded by alpha-helices. Each subunit contains an active site within a large crevice.; GO: 0008804 carbamate kinase activity, 0006525 arginine metabolic process.

Probab=98.02 E-value=0.0003 Score=48.51 Aligned_cols=222 Identities=21% Similarity=0.281 Sum_probs=136.2 Q ss_pred CEEEEEECCCCCC------CH----HHHHHHHHHHHHHHHCCCCEEEEEECCCCHHHHHHHHHHHHH-CCCCHHHHHHHH Q ss_conf 6699960858458------88----999999999999996799889998068730489999999861-489988999999 Q gi|254780873|r 2 ARIVMKFGGTSVA------NI----DCIRSAALHVKREVDRGQEVAMVVSAMSGETDRLAELCRQVT-SIDNARERDVVI 70 (411) Q Consensus 2 ~~iV~KfGGtSv~------~~----~~i~~v~~~i~~~~~~g~~~ivVvSA~~g~Td~L~~l~~~~~-~~~~~~~~d~i~ 70 (411) T Consensus 1 k~~VvALGGNAlLqRg~~~s~~~Q~~nv~~t~~~l~~~~~~G~~lvi~HGNGPQVG~LlLQ~~A~~~~~~~~~~PLDV~G 80 (321) T TIGR00746 1 KRVVVALGGNALLQRGEKGSAENQRKNVEQTAPQLVKLIKRGYELVITHGNGPQVGLLLLQNQAADSEKVVPAMPLDVLG 80 (321) T ss_pred CEEEEEECCHHHHHCCCCCCHHHHHHHHHHHHHHHHHHHHCCCEEEEEECCHHHHHHHHHHHHHHHHCCCCCCCCCCEEC T ss_conf 94889737358863788379889999999999999999861897999847803688899999897603788988743202 Q ss_pred --HHHH--HHHHHHHHHHHHHCCCCCCCC--------CC----CCC------CCCC----------------------CC Q ss_conf --8312--999999999998439986356--------73----324------5512----------------------13 Q gi|254780873|r 71 --STGE--QVSSGLMVLALQSLGIQAISL--------QG----WQI------PIMT----------------------DS 106 (411) Q Consensus 71 --s~GE--~~s~~l~a~~l~~~G~~a~~l--------~~----~~~------~i~t----------------------~~ 106 (411) T Consensus 81 AmSQG~IGYml~q~l~~~L~~~g~~~~vaT~~TQt~VD~~DpAF~nPTKpiGPfY~e~EAk~~~a~~~g~~~ke~tdGD~ 160 (321) T TIGR00746 81 AMSQGMIGYMLQQALNNELPKEGLEKPVATVLTQTIVDPKDPAFQNPTKPIGPFYDEEEAKKRLAAEKGWIVKEDTDGDD 160 (321) T ss_pred CCCCCHHHHHHHHHHHHHHHHCCCCCCCEEEEEEEEECCCCCCCCCCCCCCCCCCCHHHHHHHHHHCCCCEECCCCCCCC T ss_conf 03353078999999999998668999853899988888888887854975168889899999998617870047888767 Q ss_pred CCCCCC------CCC-CCCCCHHHHHHHCCEEEEECCCCC--CCCCCEEEECCCC------CCHHHHHHHHHHCHHHHHH Q ss_conf 355200------012-362100334310680586034333--5568424430686------2428999998847345565 Q gi|254780873|r 107 LHGMAR------ICR-VDEKKIVTHLKKKQVVVITGFQGL--SHDNSVTTLGRGG------SDTSAVAIAAAIKADRCDI 171 (411) Q Consensus 107 ~~~~a~------~~~-~~~~~l~~~l~~~~v~v~~Gf~g~--~~~g~~ttlgRGG------SD~tA~~ia~~l~A~~~~i 171 (411) T Consensus 161 g~gwRrVVPSP~P~~I~E~~~Ik~L~e~g~iVI~~GGGGvPv~~dg~~kkl--~GVeAVIDKDlA~~~LA~~~~AD~L~I 238 (321) T TIGR00746 161 GRGWRRVVPSPRPKDIVEAEVIKTLVENGVIVICSGGGGVPVVEDGAEKKL--KGVEAVIDKDLASEKLAEEVNADILVI 238 (321) T ss_pred CCCCEEECCCCCCCCCEECHHHHHHHHCCEEEEEECCCCEEEEECCCCCEE--EEEEEEECHHHHHHHHHHHHCCCEEEE T ss_conf 783037657999966312077899864882799857882035662894302--201103236688898887743874431 Q ss_pred HCCHHHHEECCCCC-CCCCCEECCCCHHHHHHHH---HC-----CCCCHHHHHHHHHHHCCC-EEEEEC Q ss_conf 34614402458421-2344110567999999988---40-----311013788764331385-267611 Q gi|254780873|r 172 YTDVCGIYTTDPRI-EPKAHLMKKISFEEMLEMS---SL-----GAKVMQVRSVELAMLYKM-CLFVRS 230 (411) Q Consensus 172 ~tdV~Gi~taDPr~-v~~a~~i~~lsy~Ea~eLa---~~-----Gakvlhp~~~~~~~~~~i-pi~i~n 230 (411) T Consensus 239 LTDVd~vy~---nygkP~e~~L~~~~~~El~~~~~~G~Fa~GSMgPKV~--AaI~Fv~~~G~~~AiIt~ 302 (321) T TIGR00746 239 LTDVDAVYV---NYGKPDEKKLREVTVEELEDYEKDGHFAAGSMGPKVE--AAIEFVESRGKKRAIITS 302 (321) T ss_pred EHHHHHHHH---CCCCHHHHHHHCCCHHHHHHHHHCCCCCCCCCCCHHH--HHHHHHHCCCCCCCEECC T ss_conf 020124522---0778247887246988999998558866889860389--998998718887400058

HHsearch alignment for GI: 254780873 and conserved domain: TIGR00746