Vitamin B12 transporter BtuCD in a nucleotide-bound outward facing state
Organism: Escherichia coli
Model: Experimental
Representation: Coarse-grained
Type: α-helical
Pfam Acc: PF01032
PDB ID: 4R9U
Membrane assignment:
Output PDB file Download
Hydrophobic thickness = 24.6 Å
Number of TM segments = 15
Sequence positions:
A: 13-28|57-77|84-104|115-132|147-163|190-205|275-291
B: 343-358|379-398|409-424|442-461|468-484|510-527|603-621|627-643
Tilt angles:
A - Segment: 13-28 - Tilt: 11.1°
A - Segment: 57-77 - Tilt: 36.4°
A - Segment: 84-104 - Tilt: 50.2°
A - Segment: 115-132 - Tilt: 28.2°
A - Segment: 147-163 - Tilt: 22.7°
A - Segment: 190-205 - Tilt: 23.8°
A - Segment: 275-291 - Tilt: 7.7°
B - Segment: 343-358 - Tilt: 18.6°
B - Segment: 379-398 - Tilt: 44.0°
B - Segment: 409-424 - Tilt: 33.7°
B - Segment: 442-461 - Tilt: 39.3°
B - Segment: 468-484 - Tilt: 16.7°
B - Segment: 510-527 - Tilt: 25.7°
B - Segment: 603-621 - Tilt: 35.5°
B - Segment: 627-643 - Tilt: 24.3°
Structural assessment:
MAIDEN score = -87.3633
The MAIDEN score is aimed at assessing the relative quality, i.e. ranking several models (the lower the score, the better the model). It comes here with a color code (red > yellow > green > blue), which is derived from a z-score calculation and indicates the absolute quality.
Scores for all residue pairs Download
[creation date: Sep-08-2016]