Outer membrane cobalamin transporter (BTUB) from E. Coli, with bound calcium. Determined by X-ray diffraction at 3.31 Å resolution. Released 29 Apr 2003.
Explore 1NQG in 3D Show helices and sheets RCSB PDB PDBe
1NQG contains 10 α-helices and 33 β-strands across 1 chain. 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.
| Element | Residues | Length | Sheet |
|---|---|---|---|
| α-helix | 19-21 | 3 | |
| β-strand | 26-30 | 5 | 1 |
| α-helix | 31-37 | 7 | |
| α-helix | 42-46 | 5 | |
| β-strand | 52-56 | 5 | 2 |
| β-strand | 64-68 | 5 | 2 |
| β-strand | 76-80 | 5 | 1 |
| β-strand | 83-84 | 2 | 1 |
| α-helix | 86-88 | 3 | |
| α-helix | 96-98 | 3 | |
| α-helix | 101-103 | 3 | |
| β-strand | 106-111 | 6 | 1 |
| α-helix | 115-118 | 4 | |
| β-strand | 125-130 | 6 | 1 |
| β-strand | 137-145 | 9 | 3 |
| β-strand | 149-159 | 11 | 3 |
| β-strand | 164-174 | 11 | 3 |
| β-strand | 198-209 | 12 | 3 |
| β-strand | 214-228 | 15 | 3 |
| β-strand | 242-257 | 16 | 3 |
| β-strand | 261-276 | 16 | 3 |
| β-strand | 291-305 | 15 | 3 |
| β-strand | 309-322 | 14 | 3 |
| β-strand | 333-348 | 16 | 3 |
| β-strand | 351-362 | 12 | 3 |
| β-strand | 366-380 | 15 | 3 |
| β-strand | 383-394 | 12 | 3 |
| α-helix | 398-402 | 5 | |
| α-helix | 410-412 | 3 | |
| β-strand | 413-426 | 14 | 3 |
| β-strand | 429-447 | 19 | 3 |
| β-strand | 452-472 | 21 | 3 |
| β-strand | 475-484 | 10 | 3 |
| β-strand | 487-488 | 2 | 3 |
| β-strand | 493-494 | 2 | 3 |
| α-helix | 495 | 1 | |
| β-strand | 501-510 | 10 | 3 |
| β-strand | 515-523 | 9 | 3 |
| β-strand | 526-530 | 5 | 4 |
| β-strand | 537-541 | 5 | 4 |
| β-strand | 544-554 | 11 | 3 |
| β-strand | 559-566 | 8 | 3 |
| β-strand | 585-593 | 9 | 3 |
| Molecule | Chains | Type | Length | Organism | UniProt |
|---|---|---|---|---|---|
| vitamin b12 receptor | A | protein | 594 | Escherichia coli | P06129 (AlphaFold model) |
>1NQG_1 vitamin b12 receptor (chains A) QDTSPDTLVVTANRFEQPRSTVLAPTTVVTRQDIDRWQSTSVNDVLRRLPGVDITQNGGS GQLSSIFIRGTNASHVLVLIDGVRLNLAGVSGSADLSQFPIALVQRVEYIRGPRSAVYGS DAIGGVVNIITTRDEPGTEISAGWGSNSYQNYDVSTQQQLGDKTRVTLLGDYAHTHGYDV VAYGNTGTQAQTDNDGFLSKTLYGALEHNFTDAWSGFVRGYGYDNRTNYDAYYSPGSPLL DTRKLYSQSWDAGLRYNGELIKSQLITSYSHSKDYNYDPHYGRYDSSATLDEMKQYTVQW ANNVIVGHGSIGAGVDWQKQTTTPGTGYVEDGYDQRNTGIYLTGLQQVGDFTFEGAARSD DNSQFGRHGTWQTSAGWEFIEGYRFIASYGTSYKAPNLGQLYGFYGNPNLDPEKSKQWEG AFEGLTAGVNWRISGYRNDVSDLIDYDDHTLKYYNEGKARIKGVEATANFDTGPLTHTVS YDYVDARNAITDTPLLRRAKQQVKYQLDWQLYDFDWGITYQYLGTRYDKDYSSYPYQTVK MGGVSLWDLAVAYPVTSHLTVRGKIANLFDKDYETVYGYQTAGREYTLSGSYTF
Substrate-induced transmembrane signaling in the cobalamin transporter BtuB. CHIMENTO, D.P., MOHANTY, A.K., KADNER, R.J. et al. Nat Struct Biol (2003) 10:394-401. DOI 10.1038/nsb914 · PubMed
Other PDB entries of the same protein (UniProt P06129 (AlphaFold model), which also has an AlphaFold model), best resolution first:
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