>gnl|CDD|163435 TIGR03723, bact_gcp, putative glycoprotease GCP. This model represents bacterial members of a protein family that is widely distributed. In a few pathogenic species, the protein is exported in a way that may represent an exceptional secondary function. This model plus companion (archaeal) model TIGR03722 together span the prokaryotic member sequences of TIGR00329, a protein family that appears universal in life, and whose broad function is unknown. A member of TIGR03722 has been characterized as a DNA-binding protein with apurinic endopeptidase activity. In contrast, the rare characterized members of the present family show O-sialoglycoprotein endopeptidase (EC. 3.4.24.57) activity after export. These include glycoprotease (gcp) from Pasteurella haemolytica A1 and a cohemolysin from Riemerella anatipestifer (GB|AAG39646.1). The member from Staphylococcus aureus is essential and is related to cell wall dynamics and the modulation of autolysis, but members are also found in the Mycoplasmas (which lack a cell wall). A reasonable hypothesis is that virulence-related activities after export are secondary to a bacterial domain-wide unknown function. Length = 314

Score = 444 bits (1144), Expect = e-125 Identities = 163/323 (50%), Positives = 210/323 (65%), Gaps = 11/323 (3%) Query: 8 VIGIETSCDETAVAVVRRKDSHGEILAEAVLSQIDQHGHYGGVVPEVAARAHVDVLDILI 67 ++GIETSCDETAVA+V D +L+ V SQI+ H YGGVVPE+A+RAH++ + LI Sbjct: 1 ILGIETSCDETAVAIV---DDGKGLLSNIVASQIELHARYGGVVPELASRAHLEAIPPLI 57 Query: 68 KQTLLRANMQISDMDSIAVTAGPGLMGGLIVGLMTAKAISYVSHKPFYAINHLEGHILTA 127 ++ L A + +SD+D+IAVTAGPGL+G L+VG+ AKA++ +KP +NHLEGH+L Sbjct: 58 EEALAEAGLTLSDIDAIAVTAGPGLIGALLVGVSFAKALALALNKPLIGVNHLEGHLLAP 117 Query: 128 RLTD-DIAFPYLVLLVSGGHTQILLVRDVAHYDRLGTTIDDALGECFDKIAKSLGLPYPG 186 L D + FP+L LLVSGGHTQ++LV+ V Y+ LG T+DDA GE FDK+A+ LGL YPG Sbjct: 118 FLEDKPLEFPFLALLVSGGHTQLVLVKGVGDYELLGETLDDAAGEAFDKVARLLGLGYPG 177 Query: 187 GVEIEKAALMGDGKRFKFPCPLVQGTLCDFSFSGLKTSVQKTICAFD-VLEKQDIADICA 245 G I+K A GD K FKFP P+ DFSFSGLKT+V I E+ D ADI A Sbjct: 178 GPAIDKLAKEGDPKAFKFPRPMTGRPGLDFSFSGLKTAVLNLIEKLKQKGEELDKADIAA 237 Query: 246 SFQVTVVRILQARLKQGFLLFRKAFPHKQAVLVVSGGVASNHFIRASLIDLCVLHGFRFV 305 SFQ VV +L + K+ K K LVV+GGVA+N +R L +L G Sbjct: 238 SFQAAVVDVLVEKTKRAL----KKTGLKT--LVVAGGVAANSRLRERLEELAEKAGLEVF 291 Query: 306 APPARLCTDNAVMIAWAALERME 328 PP LCTDNA MIA A ER++ Sbjct: 292 IPPLELCTDNAAMIAAAGYERLK 314

RPSBLAST alignment for GI: 254781038 and conserved domain: TIGR03723