>cd04876 ACT_RelA-SpoT ACT domain found C-terminal of the RelA/SpoT domains. ACT_RelA-SpoT: the ACT domain found C-terminal of the RelA/SpoT domains. Enzymes of the Rel/Spo family enable bacteria to survive prolonged periods of nutrient limitation by controlling guanosine-3'-diphosphate-5'-(tri)diphosphate ((p)ppGpp) production and subsequent rRNA repression (stringent response). Both the synthesis of (p)ppGpp from ATP and GDP(GTP), and its hydrolysis to GDP(GTP) and pyrophosphate, are catalyzed by Rel/Spo proteins. In Escherichia coli and its close relatives, the metabolism of (p)ppGpp is governed by two homologous proteins, RelA and SpoT. The RelA protein catalyzes (p)ppGpp synthesis in a reaction requiring its binding to ribosomes bearing codon-specified uncharged tRNA. The major role of the SpoT protein is the breakdown of (p)ppGpp by a manganese-dependent (p)ppGpp pyrophosphohydrolase activity. Although the stringent response appears to be tightly regulated by these two enzymes i

Probab=96.82  E-value=0.0064  Score=41.21  Aligned_cols=59  Identities=12%  Similarity=0.224  Sum_probs=43.6

Q ss_pred             EEEECCCCCCHHHHHHHHHHHCCCCEEEEEEEECCCCCEEEEEEEEECCCCHHHHHHHHHH
Q ss_conf             9998599876688899999857981897344432436889999999728852777988898
Q gi|254780911|r    6 LTITCPSNEEITSIIPDYLSTQGCNILDISQFNDLDTSKLFMRISFVFNTCMKLFIADFQP   66 (288)
Q Consensus         6 Lti~CpD~~GIVA~VT~~La~~g~NI~~~~Q~~D~~~~~FFmRi~f~~~~~~~~l~~~f~~   66 (288)
T Consensus         1 i~I~~~Dr~GlL~dI~~~is~~~~nI~~v~~~~~-~~~~~~~~~~v~V~d-~~~L~~li~~   59 (71)
T cd04876           1 IRVEAIDRPGLLADITTVIAEEKINILSVNTRTD-DDGLATIRLTLEVRD-LEHLARIMRK   59 (71)
T ss_pred             CEEEEECCCCHHHHHHHHHHHCCCCEEEEEEEEC-CCCEEEEEEEEEECC-HHHHHHHHHH
T ss_conf             9999983778799999999987996799999975-898699999999889-9999999999