RPSBLAST alignment for GI: 254780613 and conserved domain: smart00788
>gnl|CDD|129024 smart00788, Adenylsucc_synt, Adenylosuccinate synthetase. Adenylosuccinate synthetase plays an important role in purine biosynthesis, by catalyzing the GTP-dependent conversion of IMP and aspartic acid to AMP. Adenylosuccinate synthetase has been characterized from various sources ranging from Escherichia coli (gene purA) to vertebrate tissues. In vertebrates, two isozymes are present - one involved in purine biosynthesis and the other in the purine nucleotide cycle. The crystal structure of adenylosuccinate synthetase from E. coli reveals that the dominant structural element of each monomer of the homodimer is a central beta-sheet of 10 strands. The first nine strands of the sheet are mutually parallel with right-handed crossover connections between the strands. The 10th strand is antiparallel with respect to the first nine strands. In addition, the enzyme has two antiparallel beta-sheets, comprised of two strands and three strands each, 11 alpha-helices and two short 3/10-helices. Further, it has been suggested that the similarities in the GTP-binding domains of the synthetase and the p21ras protein are an example of convergent evolution of two distinct families of GTP-binding proteins PUBMED:8244965. Structures of adenylosuccinate synthetase from Triticum aestivum and Arabidopsis thaliana when compared with the known structures from E. coli reveals that the overall fold is very similar to that of the E. coli protein PUBMED:10669609. Length = 421
Score = 625 bits (1614), Expect = e-180
Identities = 233/424 (54%), Positives = 300/424 (70%), Gaps = 4/424 (0%)
Query: 3 NVVVVGLQWGDEGKGKIVDWLSENADVIVRFQGGNNAGHTLKVNDIVYKLSLLPSGVVRP 62
VVVVG QWGDEGKGKIVD+L+E ADV+VRFQGGNNAGHT+ V YKL LLPSG++ P
Sbjct: 1 VVVVVGAQWGDEGKGKIVDYLAEKADVVVRFQGGNNAGHTVVVGGKKYKLHLLPSGILNP 60
Query: 63 DKMSIIGSSVVVDPHAFISEIESLAHQGICVTPNNLRIANNASLILSIHRDLDMLREGAL 122
+K +IG+ VV+DP A EI+ L +G+ V + L I++ A LIL H LD LRE A
Sbjct: 61 NKKCVIGNGVVIDPEALFKEIDQLEAKGVDVR-DRLFISDRAHLILPYHIALDKLREKAR 119
Query: 123 SPCGAHIGTTQRGIGPAYEDRVGRRAIRVMDLTDVEHISKKIEQLLLHHNALRRSF-GEK 181
IGTT RGIGPAYED+V RR IRV DL D + +K+E+LL + N L + G +
Sbjct: 120 G--KKKIGTTGRGIGPAYEDKVARRGIRVGDLFDEDVFREKLEELLDYKNFLLKKLYGAE 177
Query: 182 EVLYKTILEELMYAREKILPFMDVIWSLLERESRKGAHILFEGAQGFLLDNDHGTYPFVT 241
V + ILEEL+ E++ P++ + LL + G +LFEGAQG LLD DHGTYP+VT
Sbjct: 178 PVDVEEILEELLEYAERLKPYVVDVSELLNDALKAGKKVLFEGAQGTLLDIDHGTYPYVT 237
Query: 242 SSNTMSAQASIGSGISPGSLGYVLGVVKAYTTRVGGGPFPTELKNQTGDFLKEVGKEFGT 301
SSNT + A+ G+GI P + YV+GVVKAYTTRVG GPFPTEL ++TG+ L+E G EFGT
Sbjct: 238 SSNTTAGGAATGAGIGPTRIDYVIGVVKAYTTRVGEGPFPTELFDETGEKLRERGHEFGT 297
Query: 302 VTNRQRRCGWLDLASVRRSVIINGVKGIALTKLDVLDGLDELKICVGYRMDGREVDFLPD 361
T R RRCGW D +R +V ING+ G+ALTKLDVLDGLDE+K+CV Y++DG+E+D+ P
Sbjct: 298 TTGRPRRCGWFDAVLLRYAVRINGITGLALTKLDVLDGLDEIKVCVAYKLDGKEIDYFPA 357
Query: 362 DSIYHTRFEPVYMILEGWKQSTAGMRVFADLPIQARNYIRKIEEVLEVPVALLSIGPERE 421
D R EP+Y L GWK+ T G+R + DLP A+ YI +IEE++ VPV+L+S GP+RE
Sbjct: 358 DLEDLERCEPIYETLPGWKEDTTGVRSYEDLPENAKKYIERIEELVGVPVSLISTGPDRE 417
Query: 422 NTLI 425
T++
Sbjct: 418 QTIV 421