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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：P03023 New Search
22PDB entries
26Biological assembly
65chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
P03023 1cjg PROTEIN (LAC REPRESSOR) Author chain A Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1cjg PROTEIN (LAC REPRESSOR) Author chain B Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1efa LAC REPRESSOR Author chain A Reference sequence 1–333 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1efa LAC REPRESSOR Author chain B Reference sequence 1–333 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1efa LAC REPRESSOR Author chain C Reference sequence 1–333 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1efa LAC REPRESSOR Author chain A Reference sequence 1–333 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P03023 1efa LAC REPRESSOR Author chain B Reference sequence 1–333 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P03023 1efa LAC REPRESSOR Author chain C Reference sequence 1–333 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P03023 1jwl Lactose Operon Repressor Author chain A Reference sequence 1–333 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1jwl Lactose Operon Repressor Author chain B Reference sequence 1–333 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1jwl Lactose Operon Repressor Author chain C Reference sequence 1–333 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1jwl Lactose Operon Repressor Author chain A Reference sequence 1–333 2 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P03023 1jwl Lactose Operon Repressor Author chain B Reference sequence 1–333 2 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P03023 1jwl Lactose Operon Repressor Author chain C Reference sequence 1–333 2 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P03023 1jye Lactose Operon Repressor Author chain A Reference sequence 1–349 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P03023 1jyf Lactose Operon Repressor Author chain A Reference sequence 1–349 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P03023 1l1m Lactose operon repressor Author chain A Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1l1m Lactose operon repressor Author chain B Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1lbg PROTEIN (LACTOSE OPERON REPRESSOR) Author chain A Reference sequence 1–360 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1lbg PROTEIN (LACTOSE OPERON REPRESSOR) Author chain B Reference sequence 1–360 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1lbg PROTEIN (LACTOSE OPERON REPRESSOR) Author chain C Reference sequence 1–360 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1lbg PROTEIN (LACTOSE OPERON REPRESSOR) Author chain D Reference sequence 1–360 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1lbg PROTEIN (LACTOSE OPERON REPRESSOR) Author chain A Reference sequence 1–360 2 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1lbg PROTEIN (LACTOSE OPERON REPRESSOR) Author chain B Reference sequence 1–360 2 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1lbg PROTEIN (LACTOSE OPERON REPRESSOR) Author chain C Reference sequence 1–360 2 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1lbg PROTEIN (LACTOSE OPERON REPRESSOR) Author chain D Reference sequence 1–360 2 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1lbh INTACT LACTOSE OPERON REPRESSOR WITH GRATUITOUS INDUCER IPTG Author chain A Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1lbh INTACT LACTOSE OPERON REPRESSOR WITH GRATUITOUS INDUCER IPTG Author chain B Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1lbh INTACT LACTOSE OPERON REPRESSOR WITH GRATUITOUS INDUCER IPTG Author chain C Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1lbh INTACT LACTOSE OPERON REPRESSOR WITH GRATUITOUS INDUCER IPTG Author chain D Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1lbi LAC REPRESSOR Author chain A Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1lbi LAC REPRESSOR Author chain B Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1lbi LAC REPRESSOR Author chain C Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1lbi LAC REPRESSOR Author chain D Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1lcc Lac Repressor Author chain A Reference sequence 1–51 1 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） Consistent with all polymers
P03023 1lcd Lac Repressor Author chain A Reference sequence 1–51 1 Protein–DNA Monomer Protein 1 DNA 2 trimeric （3） Consistent with all polymers
P03023 1lqc LAC REPRESSOR Author chain A Reference sequence 1–56 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P03023 1osl Lactose operon repressor Author chain A Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1osl Lactose operon repressor Author chain B Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 1tlf LAC REPRESSOR Author chain A Reference sequence 19–319 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1tlf LAC REPRESSOR Author chain B Reference sequence 19–319 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1tlf LAC REPRESSOR Author chain C Reference sequence 19–319 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 1tlf LAC REPRESSOR Author chain D Reference sequence 19–319 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 2bjc LACTOSE OPERON REPRESSOR Author chain A Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2bjc LACTOSE OPERON REPRESSOR Author chain B Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2kei Lactose operon repressor Author chain A Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2kei Lactose operon repressor Author chain B Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2kej Lactose operon repressor Author chain A Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2kej Lactose operon repressor Author chain B Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2kek Lactose operon repressor Author chain A Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2kek Lactose operon repressor Author chain B Reference sequence 1–62 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2p9h Lactose operon repressor Author chain A Reference sequence 62–330 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P03023 2p9h Lactose operon repressor Author chain B Reference sequence 62–330 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P03023 2paf Lactose operon repressor Author chain A Reference sequence 62–330 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P03023 2paf Lactose operon repressor Author chain B Reference sequence 62–330 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P03023 2pe5 Lactose operon repressor Author chain A Reference sequence 2–331 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2pe5 Lactose operon repressor Author chain B Reference sequence 2–331 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2pe5 Lactose operon repressor Author chain C Reference sequence 2–331 1 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2pe5 Lactose operon repressor Author chain A Reference sequence 2–331 2 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2pe5 Lactose operon repressor Author chain B Reference sequence 2–331 2 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 2pe5 Lactose operon repressor Author chain C Reference sequence 2–331 2 Protein–DNA Homooligomer Protein 2 DNA 2 tetrameric （4） Consistent with all polymers
P03023 3edc Lactose operon repressor Author chain A Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 3edc Lactose operon repressor Author chain B Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 3edc Lactose operon repressor Author chain C Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
P03023 3edc Lactose operon repressor Author chain D Reference sequence 1–360 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count

“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.