9KOS: RaTG13 RBD

Crystal structure of RaTG13 RBD complexed with sheep ACE2. Determined by X-ray diffraction at 3.74 Å resolution. Released 26 Nov 2025.

Method
X-ray diffraction
Resolution
3.74 Å
Organisms
Ovis aries, Bat coronavirus RaTG13
Chains
2
Atoms
6,472
Mol. weight
91.92 kDa
Ligands
NAG
Released
26 Nov 2025

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

Secondary structure: helices and β-sheets

9KOS contains 52 α-helices and 26 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: 38 helices, 9 β-strands

ElementResiduesLengthSheet
α-helix21-5333
α-helix56-8025
α-helix85-873
α-helix91-10010
α-helix104-1074
α-helix110-12920
β-strand131-13331
β-strand140-14231
α-helix149-1535
α-helix157-17014
α-helix172-19221
α-helix198-2036
β-strand20812
β-strand21612
α-helix220-25031
α-helix252-2543
α-helix2601
β-strand261-26223
α-helix263-2653
α-helix275-2773
α-helix278-2814
α-helix293-2986
α-helix303-31513
α-helix319-3235
α-helix324-3296
β-strand33114
β-strand346-35164
β-strand354-35854
α-helix365-38319
α-helix384-3863
α-helix389-3913
α-helix399-41214
α-helix414-4196
α-helix431-44515
α-helix448-46417
α-helix469-4713
α-helix472-4798
α-helix480-4845
β-strand486-48723
α-helix499-5013
α-helix503-5064
α-helix512-56120
α-helix568-5703
α-helix577-58711
α-helix595-6039
α-helix611-6166
α-helix618-6269
Chain E: 14 helices, 17 β-strands
ElementResiduesLengthSheet
α-helix3341
β-strand33515
α-helix3361
α-helix339-3424
α-helix347-3482
β-strand34916
α-helix350-3523
β-strand354-35856
β-strand361-36225
α-helix365-3695
β-strand376-37946
α-helix387-3893
β-strand391-39225
β-strand394-403106
α-helix405-4095
α-helix417-4215
β-strand432-43766
α-helix439-4424
β-strand44817
β-strand452-45438
α-helix460-4623
α-helix471-4722
β-strand473-47429
β-strand48519
β-strand488-48929
β-strand492-49438
β-strand49717
α-helix503-5053
β-strand507-516106
α-helix521-5222
β-strand524-52525

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
Angiotensin-converting enzymeAprotein596Ovis ariesA0A6P3TFC0 (AlphaFold model)
RaTG13 rbdEprotein195Bat coronavirus RaTG13A0ABF7PLN6
Sequence of entity 1 (A), FASTA
>9KOS_1 Angiotensin-converting enzyme (chains A)
STTEGQAKTFLEKFNHEAEDLSYQSSLASWNYNTNITDENVQKMNEARAKWSAFYEEQSR
MARTYSLEEIQNLTLKRQLKALQHSGTSVLSAEKSKRLNTILNKMSTIYSTGKVLDPNTQ
ECLALEPGLDDIMENSRDYNRRLWAWEGWRAEVGKQLRPLYEEYVVLENEMARANNYEDY
GDYWRGDYEVTGAGDYDYSRDQLMKDVERTFEEIKPLYEQLHAYVRAKLMDTYPSYISPT
GCLPAHLLGDMWGRFWTNLYSLTVPFEHKPSIDVTEKMKNQSWDAERIFKEAEKFFVSIG
LPYMTQGFWDNSMLTEPGDGRKVVCHPTAWDLGKGDFRIKMCTKVTMDDFLTAHHEMGHI
QYDMAYATQPYLLRNGANEGFHEAVGEIMSLSAATPHYLKALGLLAPDFYEDNETEINFL
LKQALTIVGTLPFTYMLEKWRWMVFKGEIPKQQWMEKWWEMKREIVGVVEPLPHDETYCD
PACLFHVAEDYSFIRYYTRTIYQFQFHEALCKTAKHEGALFKCDISNSTEAGQRLLQMLR
LGKSEPWTLALENIVGIKTMDVKPLLNYFEPLFTWLKEQNRNSFVGWSTEWTPYSD
Sequence of entity 2 (E), FASTA
>9KOS_2 RaTG13 RBD (chains E)
TNLCPFGEVFNATTFASVYAWNRKRISNCVADYSVLYNSTSFSTFKCYGVSPTKLNDLCF
TNVYADSFVITGDEVRQIAPGQTGKIADYNYKLPDDFTGCVIAWNSKHIDAKEGGNFNYL
YRLFRKANLKPFERDISTEIYQAGSKPCNGQTGLNCYYPLYRYGFYPTDGVGHQPYRVVV
LSFELLNAPATVCGH

Ligands and cofactors

IDNameFormulaCopies
NAG2-acetamido-2-deoxy-beta-D-glucopyranoseC8 H15 N O61

Primary citation

Crystal structure of RaTG13 RBD complexed with sheep ACE2. Lan, J., Wang, C.H. To be published.

Browse structure collections

About this viewer

MolViewer shows 9KOS directly in your browser with nothing to install. Switch between cartoon, ball-and-stick, spacefill and surface views, color by chain, secondary structure or B-factor, measure distances, angles and dihedrals, and share or embed the view.