HHsearch alignment for GI: 254780163 and conserved domain: TIGR00763

>TIGR00763 lon ATP-dependent protease La; InterPro: IPR004815 Proteolytic enzymes that exploit serine in their catalytic activity are ubiquitous, being found in viruses, bacteria and eukaryotes . They include a wide range of peptidase activity, including exopeptidase, endopeptidase, oligopeptidase and omega-peptidase activity. Over 20 families (denoted S1 - S66) of serine protease have been identified, these being grouped into clans on the basis of structural similarity and other functional evidence . Structures are known for members of the clans and the structures indicate that some appear to be totally unrelated, suggesting different evolutionary origins for the serine peptidases . Not withstanding their different evolutionary origins, there are similarities in the reaction mechanisms of several peptidases. Chymotrypsin, subtilisin and carboxypeptidase C have a catalytic triad of serine, aspartate and histidine in common: serine acts as a nucleophile, aspartate as an electrophile, and histidine as a base . The geometric orientations of the catalytic residues are similar between families, despite different protein folds . The linear arrangements of the catalytic residues commonly reflect clan relationships. For example the catalytic triad in the chymotrypsin clan (PA) is ordered HDS, but is ordered DHS in the subtilisin clan (SB) and SDH in the carboxypeptidase clan (SC) , . Peptidases are grouped into clans and families. Clans are groups of families for which there is evidence of common ancestry. Each clan is identified with two letters, the first representing the catalytic type of the families included in the clan (with the letter 'P' being used for a clan containing families of more than one of the catalytic types serine, threonine and cysteine). Some families cannot yet be assigned to clans, and when a formal assignment is required, such a family is described as belonging to clan A-, C-, M-, S-, T- or U-, according to the catalytic type. Some clans are divided into subclans because there is evidence of a very ancient divergence within the clan, for example MA(E), the gluzincins, and MA(M), the metzincins. Families are grouped by their catalytic type, the first character representing the catalytic type: A, aspartic; C, cysteine; G, glutamic acid; M, metallo; S, serine; T, threonine; and U, unknown. The serine, threonine and cysteine peptidases utilise the amino acid as a nucleophile and form an acyl intermediate - these peptidases can also readily act as transferases. In the case of aspartic, glutamic and metallopeptidases, the nucleophile is an activated water molecule. This signature defines the bacterial and eukaryotic lon proteases, which are ATP-dependent serine peptidases belonging to the MEROPS peptidase family S16 (lon protease family, clan SF). This family of sequences does not include the archaeal lon homologs, IPR004663 from INTERPRO. In the eukaryotes the majority of the proteins are located in the mitochondrial matrix , . In yeast, Pim1, is located in the mitochondrial matrix, is required for mitochondrial function, is constitutively expressed but is increased after thermal stress, suggesting that Pim1 may play a role in the heat shock response .; GO: 0004176 ATP-dependent peptidase activity, 0005524 ATP binding, 0006510 ATP-dependent proteolysis.
Probab=98.70  E-value=1.7e-07  Score=72.97  Aligned_cols=152  Identities=28%  Similarity=0.428  Sum_probs=111.8

Q ss_pred             EEECCCCCHHHHHHHHHHHHHHCCCCCHHHHEEEEEEEEHHHH--HC---CC--CCCCHHHHHHHHHHHHHCCCCCEEEE
Q ss_conf             8966764116689999999985489883452014455404675--30---63--43123789999999872038983999
Q gi|254780163|r  229 LYVGDPGVGKTAIAEGFAKQIVDGMVPDILLGARIFSLDMGNL--IA---GT--RYRGDFEERIKKIVKEIESYANAILY  301 (798)
Q Consensus       229 ~lvG~~gvGktaive~la~~i~~~~vp~~l~~~~i~~ld~~~l--~a---g~--~~rg~fe~r~~~~~~~~~~~~~~ilf  301 (798)
T Consensus       454 ClvGPPGVGKTSlg~SIA~AL----------nRkFvR~SlGG~~DeAEIrGHRRTYvGAMPGriiQ~lk~~~t~-NPl~L  522 (941)
T TIGR00763       454 CLVGPPGVGKTSLGKSIAKAL----------NRKFVRFSLGGVRDEAEIRGHRRTYVGAMPGRIIQGLKKAKTK-NPLIL  522 (941)
T ss_pred             EEECCCCCCHHHHHHHHHHHH----------CCEEEEEEECCCEEHHHCCCCCCCCCCCCHHHHHHHHHHCCCC-CCEEE
T ss_conf             720726954222789999996----------8804999526722031127864320346725789998760415-88068


Q ss_pred             ECCHHHHH-CCCCCCCCC-----------------------CCHHHHHHHHHCCCCEEEEEECCHHHHHHHHHCCH-HHH
Q ss_conf             73616630-155444344-----------------------77788887663026603887304899999852011-143
Q gi|254780163|r  302 IDEIHTLV-GAGSASGIS-----------------------VDASNLLKPALSSGAVRCIGSTTYSEYRQFFEKDK-ALV  356 (798)
Q Consensus       302 ideih~li-gag~~~g~~-----------------------~d~an~lkP~L~rg~~~~IgatT~~ey~~~~e~d~-al~  356 (798)
T Consensus       523 lDEIDK~~~~~~~~GDPaSALLEvLDPEQN~~F~DHYldvp~DLS~V~-C-------yFi~--TAN----~~d~IP~PLL  588 (941)
T TIGR00763       523 LDEIDKIGLKSSFRGDPASALLEVLDPEQNNAFSDHYLDVPFDLSKVL-C-------YFIA--TAN----SIDTIPRPLL  588 (941)
T ss_pred             EEEEEEECCCCCCCCCHHHHHHHHCCHHHCCCCCCCCCCCCCCHHHHH-H-------HEEE--CCC----CCCCCCCCCC
T ss_conf             620220016788655637888641286436042553002340042002-1-------0002--447----5767772213


Q ss_pred             HHCEEEEECCCCHHHHHHHHHH-HHHHHHHHCC-----CEECCHHHHHHHHHHHH
Q ss_conf             2001443068786899999986-1276654103-----51211178999998654
Q gi|254780163|r  357 RRFQKIDVSEPSIEDAIEIVKG-IKPYFEEHHQ-----LRYSKEAIRAAVQLSVR  405 (798)
Q Consensus       357 rrF~~i~v~ep~~~~~~~iL~~-~~~~ye~~h~-----v~~~~~al~~av~ls~r  405 (798)
T Consensus       589 DRMEvI~lsGY~~~EK~~IA~~yLiP~~~~~~GL~~~~l~~~d~al~~lI~~YtR  643 (941)
T TIGR00763       589 DRMEVIELSGYTEEEKLEIAKKYLIPKALEDHGLKPDELKISDEALLLLIKYYTR  643 (941)
T ss_pred             CCEEEEECCCCCHHHHHHHHHHCCHHHHHHHHCCCCCCEEECHHHHHHHHHHHHH
T ss_conf             7402452388876789999985471367987088813221268999999987513