9N7D: Angiotensin-converting enzyme 2

Structure of the Rattus norvegicus ACE2 receptor bound HsItaly2011 RBD complex. Determined by electron microscopy at 2.5 Å resolution. Released 27 Aug 2025.

Method
Electron microscopy
Resolution
2.5 Å
Organisms
Rattus norvegicus, Merbecovirus
Chains
2
Atoms
7,246
Mol. weight
121.45 kDa
Ligands
NAG, ZN
Released
27 Aug 2025

Explore 9N7D in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

9N7D contains 50 α-helices and 31 β-strands across 2 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 40 helices, 18 β-strands

ElementResiduesLengthSheet
α-helix20-5132
α-helix56-8025
α-helix91-10010
α-helix104-1074
α-helix110-12920
β-strand131-13331
β-strand141-14331
β-strand14711
α-helix148-1547
α-helix158-16811
α-helix169-1735
α-helix174-19219
α-helix199-2035
α-helix204-2074
β-strand20912
β-strand21712
α-helix221-25131
β-strand26013
α-helix2611
β-strand262-26324
α-helix264-2663
α-helix276-2816
α-helix294-2996
α-helix304-31714
α-helix320-3245
α-helix325-3306
β-strand33215
β-strand347-35265
β-strand355-35955
α-helix366-38419
α-helix390-3923
α-helix400-41213
α-helix415-4206
α-helix432-46433
α-helix470-4723
α-helix473-4808
α-helix481-4855
β-strand487-48824
α-helix500-5023
α-helix504-5074
α-helix514-53219
α-helix539-5413
α-helix548-55811
α-helix566-5749
α-helix582-5876
α-helix589-59810
β-strand60713
β-strand618-62256
α-helix637-65822
α-helix667-6693
β-strand670-67346
β-strand680-68566
β-strand68617
β-strand69417
α-helix695-6962
α-helix697-70610
α-helix708-7158
β-strand722-72436
Chain B: 10 helices, 13 β-strands
ElementResiduesLengthSheet
α-helix392-3965
α-helix402-4043
β-strand406-41058
β-strand41419
α-helix417-4215
β-strand425-43178
α-helix436-4405
β-strand444110
β-strand446-45388
α-helix456-4627
α-helix4691
α-helix470-4745
β-strand483-48978
β-strand501-5121211
β-strand516-519411
α-helix521-5233
α-helix531-5344
β-strand543-547511
β-strand552-560911
α-helix561-5622
β-strand566-57498
β-strand582110
β-strand58319

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
Angiotensin-converting enzyme 2Aprotein767Rattus norvegicusQ5EGZ1 (AlphaFold model)
Spike glycoproteinBprotein271MerbecovirusA3EXD0 (AlphaFold model)
Sequence of entity 1 (A), FASTA
>9N7D_1 Angiotensin-converting enzyme 2 (chains A)
MSSSCWLLLSLVAVATAQSLIEEKAESFLNKFNQEAEDLSYQSSLASWNYNTNITEENAQ
KMNEAAAKWSAFYEEQSKIAQNFSLQEIQNATIKRQLKALQQSGSSALSPDKNKQLNTIL
NTMSTIYSTGKVCNSMNPQECFLLEPGLDEIMATSTDYNRRLWAWEGWRAEVGKQLRPLY
EEYVVLKNEMARANNYEDYGDYWRGDYEAEGVEGYNYNRNQLIEDVENTFKEIKPLYEQL
HAYVRTKLMEVYPSYISPTGCLPAHLLGDMWGRFWTNLYPLTTPFLQKPNIDVTDAMVNQ
SWDAERIFKEAEKFFVSVGLPQMTPGFWTNSMLTEPGDDRKVVCHPTAWDLGHGDFRIKM
CTKVTMDNFLTAHHEMGHIQYDMAYAKQPFLLRNGANEGFHEAVGEIMSLSAATPKHLKS
IGLLPSNFQEDNETEINFLLKQALTIVGTLPFTYMLEKWRWMVFQDKIPREQWTKKWWEM
KREIVGVVEPLPHDETYCDPASLFHVSNDYSFIRYYTRTIYQFQFQEALCQAAKHDGPLH
KCDISNSTEAGQKLLNMLSLGNSGPWTLALENVVGSRNMDVKPLLNYFQPLFVWLKEQNR
NSTVGWSTDWSPYADQSIKVRISLKSALGKNAYEWTDNEMYLFRSSVAYAMREYFSREKN
QTVPFGEADVWVSDLKPRVSFNFFVTSPKNVSDIIPRSEVEEAIRMSRGRINDIFGLNDN
SLEFLGIYPTLKPPYEPPVTIGLNDIFEAQKIEWHEGGSHHHHHHHH
Sequence of entity 2 (B), FASTA
>9N7D_2 Spike glycoprotein (chains B)
MGILPSPGMPALLSLVSLLSVLLMGCVAETGTECDFSKLFKAAPPQIYNFSRLVFTNCNY
NLTKLLSLFHVSEFSCHQVSPSALASGCYSSLTVDYFAYPLYLASYLQQGSTGEIAQYNY
KQDFSNPTCRILASVPANVSIPKPDKYIWLSQCYSFSAYSGDVPHYVLPGQYTPCLYLTS
SGFDNSYQTNRDFQNKMAATGVISSMTDNLQMAFVISVQYGTDTNSVCPMQALRLVPRGS
SSGGSGLNDIFEAQKIEWHEGGSHHHHHHHH

Ligands and cofactors

IDNameFormulaCopies
NAG2-acetamido-2-deoxy-beta-D-glucopyranoseC8 H15 N O65
ZNZinc ionZn1

Primary citation

ACE2 utilization of HKU25 clade MERS-related coronaviruses with broad geographic distribution. Liu, C., Park, Y.J., Ma, C.B. et al. bioRxiv (2025). DOI 10.1101/2025.02.19.639017 · PubMed

Other PDB entries of the same protein (UniProt Q5EGZ1 (AlphaFold model), which also has an AlphaFold model), best resolution first:

Browse structure collections

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