Eukaryotic Sliding Clamp PCNA Bound to DNA

Analysis of the role of PCNA-DNA contacts during clamp loading.

DNA (5'-D(*CP*CP*CP*AP*TP*CP*GP*TP*AP*T)-3')

DNA (5'-D(*TP*TP*TP*TP*AP*TP*AP*CP*GP*AP*TP*GP*GP*G)-3')

GPHMASMLEAKFEEASLFKRIIDGFKDCVQLVNFQCKEDGIIAQAVDDSRVLLVSLEIGVEAFQEYRCDHPVTLGMDLTS
LSKILRCGNNTDTLTLIADNTPDSIILLFEDTKKDRIAEYSLKLMDIDADFLKIEELQYDSTLSLPSSEFSKIVRDLSQL
SDSINIMITKETIKFVADGDIGSGSVIIKPFVDMEHPETSIKLEMDQPVDLTFGAKYLLDIIKGSSLSDRVGIRLSSEAP
ALFQFDLKSGFLQFFLAPKFNDEGSNSQSNGSGALEAKFEEASLFKRIIDGFKDCVQLVNFQCKEDGIIAQAVDDSRVLL
VSLEIGVEAFQEYRCDHPVTLGMDLTSLSKILRCGNNTDTLTLIADNTPDSIILLFEDTKKDRIAEYSLKLMDIDADFLK
IEELQYDSTLSLPSSEFSKIVRDLSQLSDSINIMITKETIKFVADGDIGSGSVIIKPFVDMEHPETSIKLEMDQPVDLTF
GAKYLLDIIKGSSLSDRVGIRLSSEAPALFQFDLKSGFLQFFLAPKFNDEGSNSQASNSGALEAKFEEASLFKRIIDGFK
DCVQLVNFQCKEDGIIAQAVDDSRVLLVSLEIGVEAFQEYRCDHPVTLGMDLTSLSKILRCGNNTDTLTLIADNTPDSII
LLFEDTKKDRIAEYSLKLMDIDADFLKIEELQYDSTLSLPSSEFSKIVRDLSQLSDSINIMITKETIKFVADGDIGSGSV
IIKPFVDMEHPETSIKLEMDQPVDLTFGAKYLLDIIKGSSLSDRVGIRLSSEAPALFQFDLKSGFLQFFLAPKFNDEE

100 mM Na Acetate, 100 mM NaCl, 14% PEG 4000, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 293K

CHAIN A CONSISTS OF THREE IDENTICAL SUBUNITS CONNECTED BY TWO LINKERS. THE MUTATIONS R110S, Y114S OCCUR IN ONE SUBUNIT ONLY AS PER THE AUTHORS, IT WAS NOT POSSIBLE TO IDENTIFY THE ORDER OF THE SUBUNITS IN THE STRUCTURE BECAUSE THE ELECTRON DENSITY MAP DID NOT DISTINGUISH THE POSITIONS OF THE MUTATIONS AND BECAUSE THE LINKERS ARE NOT VISIBLE IN THE ELECTRON DENSITY MAP. SINCE IT IS UNKNOWN WHICH SUBUNIT IN THE STRUCTURE CONTAINS THE MUTATIONS, THE RESIDUES AT THESE POSITIONS IN ALL THREE SUBUNITS WERE BUILT AS WILD-TYPE

DNA replication, DNA-binding, clamp loader, DNA sliding clamp, DNA BINDING PROTEIN-DNA complex

MLEAKFEEASLFKRIIDGFKDCVQLVNFQCKEDGIIAQAVDDSRVLLVSLEIGVEAFQEYRCDHPVTLGMDLTSLSKILR
CGNNTDTLTLIADNTPDSIILLFEDTKKDRIAEYSLKLMDIDADFLKIEELQYDSTLSLPSSEFSKIVRDLSQLSDSINI
MITKETIKFVADGDIGSGSVIIKPFVDMEHPETSIKLEMDQPVDLTFGAKYLLDIIKGSSLSDRVGIRLSSEAPALFQFD
LKSGFLQFFLAPKFNDE

LEAKFEEASLFKRIIDGFKDCVQLVNFQCKEDGIIAQAVDDSRVLLVSLEIGVEAFQEYRCDHPVTLGMDLTSLSKILRC
GNNTDTLTLIADNTPDSIILLFEDTKKDRIAEYSLKLMDIDADFLKIEELQYDSTLSLPSSEFSKIVRDLSQLSDSINIM
ITKETIKFVADGDIGSGSVIIKPFVDMEHPETSIKLEMDQPVDLTFGAKYLLDIIKGSSLSDRVGIRLSSEAPALFQFDL
KSGFLQFFLAPKFNDE

LEAKFEEASLFKRIIDGFKDCVQLVNFQCKEDGIIAQAVDDSRVLLVSLEIGVEAFQEYRCDHPVTLGMDLTSLSKILRC
GNNTDTLTLIADNTPDSIILLFEDTKKDRIAEYSLKLMDIDADFLKIEELQYDSTLSLPSSEFSKIVRDLSQLSDSINIM
ITKETIKFVADGDIGSGSVIIKPFVDMEHPETSIKLEMDQPVDLTFGAKYLLDIIKGSSLSDRVGIRLSSEAPALFQFDL
KSGFLQFFLAPKFNDEE