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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：Q9UL51 New Search
3PDB entries
3Biological assembly
6chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
Q9UL51 2mpf Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 2 Author chain A Reference sequence 521–672 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
Q9UL51 3u10 Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 2 Author chain A Reference sequence 470–672 1 Protein homooligomer Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9UL51 9r1v ;Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 1,Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 2 ; Author chain A Reference sequence 471–705 1 Insufficient information Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9UL51 9r1v ;Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 1,Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 2 ; Author chain B Reference sequence 471–705 1 Insufficient information Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9UL51 9r1v ;Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 1,Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 2 ; Author chain C Reference sequence 471–705 1 Insufficient information Homooligomer Protein 4 tetrameric （4） Consistent with protein count
Q9UL51 9r1v ;Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 1,Potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 2 ; Author chain D Reference sequence 471–705 1 Insufficient information 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.