Macromolecule Annotations for the Entities in PDB 1PP8

Domain Annotation: SCOP Classification SCOP Database (version: 1.75) Homepage

Chains Domain Info Class Fold Superfamily Family Domain Species
F d1pp8f_ All alpha proteins DNA/RNA-binding 3-helical bundle "Winged helix" DNA-binding domain 39 kda initiator binding protein, IBP39, N- terminal domain 39 kda initiator binding protein, IBP39, N- terminal domain Trichomonas vaginalis [TaxId: 5722]
M d1pp8m_ All alpha proteins DNA/RNA-binding 3-helical bundle "Winged helix" DNA-binding domain 39 kda initiator binding protein, IBP39, N- terminal domain 39 kda initiator binding protein, IBP39, N- terminal domain Trichomonas vaginalis [TaxId: 5722]
O d1pp8o_ All alpha proteins DNA/RNA-binding 3-helical bundle "Winged helix" DNA-binding domain 39 kda initiator binding protein, IBP39, N- terminal domain 39 kda initiator binding protein, IBP39, N- terminal domain Trichomonas vaginalis [TaxId: 5722]
P d1pp8p_ All alpha proteins DNA/RNA-binding 3-helical bundle "Winged helix" DNA-binding domain 39 kda initiator binding protein, IBP39, N- terminal domain 39 kda initiator binding protein, IBP39, N- terminal domain Trichomonas vaginalis [TaxId: 5722]
U d1pp8u_ All alpha proteins DNA/RNA-binding 3-helical bundle "Winged helix" DNA-binding domain 39 kda initiator binding protein, IBP39, N- terminal domain 39 kda initiator binding protein, IBP39, N- terminal domain Trichomonas vaginalis [TaxId: 5722]
V d1pp8v_ All alpha proteins DNA/RNA-binding 3-helical bundle "Winged helix" DNA-binding domain 39 kda initiator binding protein, IBP39, N- terminal domain 39 kda initiator binding protein, IBP39, N- terminal domain Trichomonas vaginalis [TaxId: 5722]

Protein Family Annotation Pfam Database Homepage

Chains Pfam Accession Pfam Identifier Pfam Description Type Source
F PF10416 IBD Transcription-initiator DNA-binding domain IBD Domain In Trichomonas vaginalis, thought to be the earliest extant eukaryote, the sole initiator element for control of the start of transcription is Inr, and this is recognised by the initiator binding protein IBP39. IBP39 contains an N-terminal Inr binding domain, IBD, connected via a flexible, proteolytically sensitive, linker (residues 127-145) to a C-terminal domain. The IBD structure reveals a winged-helix-wing conformation with each element binding to DNA, the central helix-turn-helix contributing the majority of the specificity-determining contacts with the Inr core motif TCAPy(T/A). The binding of IBP39 to the Inr directly recruits RNA polymerase II and in this way initiates transcription [1]. PFAM PF10416

Protein Modification Annotation

Type PDB Residue Nr. Description