>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=99.47 E-value=5.4e-13 Score=99.76 Aligned_cols=229 Identities=20% Similarity=0.215 Sum_probs=142.7 Q ss_pred EEEEEEEEEEEEEC-CCCCCC--CHHHHHHHHHHHHHHHHCCCEEEEEECCC-CCHHHHH----HHC---CCCCCCCHHH Q ss_conf 49999940036853-887770--89999999999999997699099982365-4102334----420---3777754024 Q gi|254780777|r 7 KRVLLKVSGEALAG-ISGFGV--DIDSVNRICADIAEVYAKGIEIGIVVGGG-NIFRGSQ----VVA---ENYLLCERST 75 (242) Q Consensus 7 KrIViKiGGSsL~~-~~~~~~--~~~~i~~ia~~I~~~~~~g~~vviV~sg~-~~~~~~~----~~~---~~~~~~~~~~ 75 (242) 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 HHHHHHHHHHHHHHHHHHHHHHHCCCCCCC-----------------------CCCHHHHHH-----H------------ Q ss_conf 678888898999999999997618864113-----------------------400100245-----6------------ Q gi|254780777|r 76 VDSMGMLSTVINALALDLALRKINVPTVIL-----------------------SSIFMPQVC-----E------------ 115 (242) Q Consensus 76 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-----------------------~~~~~~~~~-----~------------ 115 (242) T Consensus 81 AmSQG~IGYml~q-~l~~~L~~~g~~~~vaT~~TQt~VD~~DpAF~nPTKpiGPfY~e~EAk~~~a~~~g~~~ke~tdGD 159 (321) T TIGR00746 81 AMSQGMIGYMLQQ-ALNNELPKEGLEKPVATVLTQTIVDPKDPAFQNPTKPIGPFYDEEEAKKRLAAEKGWIVKEDTDGD 159 (321) T ss_pred CCCCCHHHHHHHH-HHHHHHHHCCCCCCCEEEEEEEEECCCCCCCCCCCCCCCCCCCHHHHHHHHHHCCCCEECCCCCCC T ss_conf 0335307899999-999999866899985389998888888888785497516888989999999861787004788876 Q ss_pred ----------------HHHHHHHCCHHHHCCCCCCCCCCCCC---------------CCCCHHHHHHHHHHHCHHHHHHC Q ss_conf ----------------65432100001100111112465567---------------77621578888864164466514 Q gi|254780777|r 116 ----------------VFSCRNAVSYLSQGKVVIFSGGTGNA---------------FLTTDSAAALRASEIGADVILKG 164 (242) Q Consensus 116 ----------------~~~~~~~~~~~~~~~~~~~~~~~~~~---------------~~~~D~~a~~ia~~~~ad~l~i~ 164 (242) T Consensus 160 ~g~gwRrVVPSP~P~~I~E~~~Ik~L~e~g~iVI~~GGGGvPv~~dg~~kkl~GVeAVIDKDlA~~~LA~~~~AD~L~IL 239 (321) T TIGR00746 160 DGRGWRRVVPSPRPKDIVEAEVIKTLVENGVIVICSGGGGVPVVEDGAEKKLKGVEAVIDKDLASEKLAEEVNADILVIL 239 (321) T ss_pred CCCCCEEECCCCCCCCCEECHHHHHHHHCCEEEEEECCCCEEEEECCCCCEEEEEEEEECHHHHHHHHHHHHCCCEEEEE T ss_conf 77830376579999663120778998648827998578820356628943022011032366888988877438744310 Q ss_pred CCCCCCCCCCCCCCCCCCCCCCCCHHHHHHC--------CCCCCCHH-HHHHHHHCCC-CEEEEECCCCCHHHHHHCCCC Q ss_conf 7543512343223444444441159999855--------99814099-9999997499-699951898547999977998 Q gi|254780777|r 165 TQVDGVYSADPRVHASSTRFDSLTYNQFIEK--------GLKVMDCA-SVVLARDCSI-PIIVFSIHSPGGIWGGLSGIG 234 (242) Q Consensus 165 tdvdGiyt~dP~~~~~ak~i~~is~~e~l~~--------G~~v~~~~-A~~~a~~~gI-~v~I~ng~~~~~i~~~l~Ge~ 234 (242) T Consensus 240 TDVd~vy~nyg-k-P~e~~L~~~~~~El~~~~~~G~Fa~GSMgPKV~AaI~Fv~~~G~~~AiIt---~L~~~~~~l~g~i 314 (321) T TIGR00746 240 TDVDAVYVNYG-K-PDEKKLREVTVEELEDYEKDGHFAAGSMGPKVEAAIEFVESRGKKRAIIT---SLETAVEALEGKI 314 (321) T ss_pred HHHHHHHHCCC-C-HHHHHHHCCCHHHHHHHHHCCCCCCCCCCCHHHHHHHHHHCCCCCCCEEC---CHHHHHHHHCCCE T ss_conf 20124522077-8-24788724698899999855886688986038999899871888740005---8589998646973 Q ss_pred CCCEECC Q ss_conf 7824668 Q gi|254780777|r 235 RSTIISG 241 (242) Q Consensus 235 ~GT~I~~ 241 (242) T Consensus 315 aGT~v~~ 321 (321) T TIGR00746 315 AGTRVSK 321 (321) T ss_pred EEEEEEC T ss_conf 2214509

HHsearch alignment for GI: 254780777 and conserved domain: TIGR00746