7CUD | pdb_00007cud

Crystal structure of HID in the unbound form

• PDB DOI: https://doi.org/10.2210/pdb7CUD/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Streptococcus pyogenes
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2020-08-22 Released: 2021-07-07 
• Deposition Author(s): Caaveiro, J.M.M., Hoshino, M., Tsumoto, K.
• Funding Organization(s): Japan Society for the Promotion of Science (JSPS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.206 (Depositor), 0.214 (DCC) 
• R-Value Work: 
  0.155 (Depositor), 0.169 (DCC) 
• R-Value Observed: 
  0.157 (Depositor) 

Starting Model: experimental

Literature

Structural basis for the recognition of human hemoglobin by the Shr protein from Streptococcus pyogenes

Caaveiro, J.M.M., Hoshino, M., Senoo, A., Nakakido, M., Nagatoishi, S., Tame, J.R.H., Tsumoto, K.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 13.78 kDa 
• Atom Count: 1,027 
• Modeled Residue Count: 116 
• Deposited Residue Count: 124 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Amino acid ABC transporter substrate-binding protein	A	124	Streptococcus pyogenes	Mutation(s): 0  Gene Names: shr, inlA_2, G3M98_06270, GTK50_07335, SAMEA3919037_01262
UniProt
Find proteins for Q99YA0 (Streptococcus pyogenes serotype M1) Explore Q99YA0  Go to UniProtKB:  Q99YA0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BR	B [auth A]	BROMIDE ION Br CPELXLSAUQHCOX-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.206 (Depositor), 0.214 (DCC) 
• R-Value Work:  0.155 (Depositor), 0.169 (DCC) 
• R-Value Observed: 0.157 (Depositor) 

Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 76.07	α = 90
b = 76.07	β = 90
c = 33.92	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-07-07 
Deposition Author(s): Caaveiro, J.M.M., Hoshino, M., Tsumoto, K.

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Funding Organization	Location	Grant Number
Japan Society for the Promotion of Science (JSPS)	Japan	15K06962

Revision History  

• Version 1.0: 2021-07-07
  Type: Initial release
  
• Version 1.1: 2023-11-29
  Changes: Data collection, Database references, Refinement description
• Version 1.2: 2025-09-17
  Changes: Advisory, Derived calculations, Structure summary