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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：Q00403 New Search
55PDB entries
62Biological assembly
94chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain A Reference sequence 110–316 1 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain E Reference sequence 110–316 1 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain I Reference sequence 110–316 1 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain M Reference sequence 110–316 1 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain Q Reference sequence 110–316 1 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain A Reference sequence 110–316 2 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain E Reference sequence 110–316 2 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain I Reference sequence 110–316 2 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain M Reference sequence 110–316 2 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain Q Reference sequence 110–316 2 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain A Reference sequence 110–316 3 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain E Reference sequence 110–316 3 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain I Reference sequence 110–316 3 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain M Reference sequence 110–316 3 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain Q Reference sequence 110–316 3 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain A Reference sequence 110–316 4 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain E Reference sequence 110–316 4 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain I Reference sequence 110–316 4 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain M Reference sequence 110–316 4 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain Q Reference sequence 110–316 4 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain A Reference sequence 110–316 5 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain E Reference sequence 110–316 5 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain I Reference sequence 110–316 5 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain M Reference sequence 110–316 5 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1c9b GENERAL TRANSCRIPTION FACTOR IIB Author chain Q Reference sequence 110–316 5 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 1dl6 TRANSCRIPTION FACTOR II B (TFIIB) Author chain A Reference sequence 2–59 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 1rly Transcription initiation factor IIB Author chain A Reference sequence 1–60 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 1ro4 Transcription initiation factor IIB Author chain A Reference sequence 1–60 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 1tfb TFIIB Author chain A Reference sequence 112–316 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 1vol PROTEIN (TRANSCRIPTION FACTOR IIB (TFIIB)) Author chain A Reference sequence 113–316 1 Protein–DNA Heteromer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
Q00403 2phg Transcription initiation factor IIB Author chain A Reference sequence 112–316 1 Protein heterocomplex Heteromer Protein 2 dimeric （2） Consistent with protein count
Q00403 5iy6 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 27 DNA 2 29-meric （29） Consistent with all polymers
Q00403 5iy7 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 27 DNA 2 29-meric （29） Consistent with all polymers
Q00403 5iy8 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 27 DNA 2 29-meric （29） Consistent with all polymers
Q00403 5iy9 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Other combination Heteromer Protein 26 DNA 2 RNA 1 29-meric （29） Consistent with all polymers
Q00403 5iya Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 21 DNA 2 23-meric （23） Consistent with all polymers
Q00403 5iyb Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 21 DNA 2 23-meric （23） Consistent with all polymers
Q00403 5iyc Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 21 DNA 2 23-meric （23） Consistent with all polymers
Q00403 5iyd Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Other combination Heteromer Protein 20 DNA 2 RNA 1 23-meric （23） Consistent with all polymers
Q00403 5wh1 Transcription initiation factor IIB Author chain A Reference sequence 107–316 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain B Reference sequence 107–316 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain C Reference sequence 107–316 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain D Reference sequence 107–316 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain A Reference sequence 107–316 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain B Reference sequence 107–316 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain C Reference sequence 107–316 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain D Reference sequence 107–316 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain A Reference sequence 107–316 3 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain B Reference sequence 107–316 3 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain C Reference sequence 107–316 3 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain D Reference sequence 107–316 3 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain A Reference sequence 107–316 4 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain B Reference sequence 107–316 4 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain C Reference sequence 107–316 4 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 5wh1 Transcription initiation factor IIB Author chain D Reference sequence 107–316 4 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q00403 6o9l Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 31 DNA 2 33-meric （33） Consistent with all polymers
Q00403 7edx Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Protein–DNA Heteromer Protein 37 DNA 2 39-meric （39） Consistent with all polymers
Q00403 7eg7 Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Protein–DNA Heteromer Protein 37 DNA 2 39-meric （39） Consistent with all polymers
Q00403 7eg8 Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Protein–DNA Heteromer Protein 37 DNA 2 39-meric （39） Consistent with all polymers
Q00403 7eg9 Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Protein–DNA Heteromer Protein 39 DNA 2 41-meric （41） Consistent with all polymers
Q00403 7ega Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Protein–DNA Heteromer Protein 39 DNA 2 41-meric （41） Consistent with all polymers
Q00403 7egb Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Protein–DNA Heteromer Protein 49 DNA 2 51-meric （51） Consistent with all polymers
Q00403 7egc Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Protein–DNA Heteromer Protein 49 DNA 2 51-meric （51） Consistent with all polymers
Q00403 7ena Transcription initiation factor IIB Author chain BA Reference sequence 1–316 1 Protein–DNA Heteromer Protein 74 DNA 2 76-meric （76） Consistent with all polymers
Q00403 7enc Transcription initiation factor IIB Author chain BA Reference sequence 1–316 1 Protein–DNA Heteromer Protein 74 DNA 2 76-meric （76） Consistent with all polymers
Q00403 7lbm Transcription initiation factor IIB Author chain O Reference sequence 1–316 1 Protein–DNA Heteromer Protein 54 DNA 2 56-meric （56） Consistent with all polymers
Q00403 7nvr Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 56 DNA 2 58-meric （58） Consistent with all polymers
Q00403 7nvs Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 20 DNA 2 22-meric （22） Consistent with all polymers
Q00403 7nvt Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 20 DNA 2 22-meric （22） Consistent with all polymers
Q00403 7nvu Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 20 DNA 2 22-meric （22） Consistent with all polymers
Q00403 7nvy Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 30 DNA 2 32-meric （32） Consistent with all polymers
Q00403 7nvz Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 30 DNA 2 32-meric （32） Consistent with all polymers
Q00403 7nw0 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 30 DNA 2 32-meric （32） Consistent with all polymers
Q00403 7zwc Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 8 DNA 2 decameric （10） Consistent with all polymers
Q00403 7zwd Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 22 DNA 2 24-meric （24） Consistent with all polymers
Q00403 7zx7 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 22 DNA 2 24-meric （24） Consistent with all polymers
Q00403 7zx8 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 22 DNA 2 24-meric （24） Consistent with all polymers
Q00403 7zxe Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 8 DNA 2 decameric （10） Consistent with all polymers
Q00403 8bvw Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 40 DNA 2 42-meric （42） Consistent with all polymers
Q00403 8byq Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 38 DNA 2 40-meric （40） Consistent with all polymers
Q00403 8bz1 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Protein–DNA Heteromer Protein 26 DNA 2 28-meric （28） Consistent with all polymers
Q00403 8gxq Transcription initiation factor IIB Author chain BA Reference sequence 1–316 1 Protein–DNA Heteromer Protein 83 DNA 4 87-meric （87） Consistent with all polymers
Q00403 8gxs Transcription initiation factor IIB Author chain BA Reference sequence 1–316 1 Protein–DNA Heteromer Protein 83 DNA 4 87-meric （87） Consistent with all polymers
Q00403 8s51 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Other combination Heteromer Protein 20 DNA 2 RNA 1 23-meric （23） Consistent with all polymers
Q00403 8s52 Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Other combination Heteromer Protein 20 DNA 2 RNA 1 23-meric （23） Consistent with all polymers
Q00403 8s5n Transcription initiation factor IIB Author chain M Reference sequence 1–316 1 Other combination Heteromer Protein 20 DNA 2 RNA 1 23-meric （23） Consistent with all polymers
Q00403 8wak Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Other combination Heteromer Protein 48 DNA 2 RNA 1 51-meric （51） Consistent with all polymers
Q00403 8wal Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Other combination Heteromer Protein 48 DNA 2 RNA 1 51-meric （51） Consistent with all polymers
Q00403 8wan Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Other combination Heteromer Protein 48 DNA 2 RNA 1 51-meric （51） Consistent with all polymers
Q00403 8wao Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Other combination Heteromer Protein 48 DNA 2 RNA 1 51-meric （51） Consistent with all polymers
Q00403 8wap Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Other combination Heteromer Protein 48 DNA 2 RNA 1 51-meric （51） Consistent with all polymers
Q00403 8waq Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Other combination Heteromer Protein 48 DNA 2 RNA 1 51-meric （51） Consistent with all polymers
Q00403 8war Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Other combination Heteromer Protein 48 DNA 2 RNA 1 51-meric （51） Consistent with all polymers
Q00403 8was Transcription initiation factor IIB Author chain R Reference sequence 1–316 1 Other combination Heteromer Protein 48 DNA 2 RNA 1 51-meric （51） Consistent with all polymers

“Homomeric versus heteromeric classification follows protein identity; different constructs of the same UniProt entry still require comparison of reference-sequence ranges, mutations and missing segments. Assemblies marked for review remain visible but are not included in the highest-confidence candidate set.