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- PDB-2rta: APOSTREPTAVIDIN, PH 2.97, SPACE GROUP I4122 -

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Basic information

Entry
Database: PDB / ID: 2rta
TitleAPOSTREPTAVIDIN, PH 2.97, SPACE GROUP I4122
ComponentsSTREPTAVIDIN
KeywordsBIOTIN-BINDING PROTEIN / I4122 APOSTREPTAVIDIN / PH 2.97
Function / homology
Function and homology information


biotin binding / extracellular region
Similarity search - Function
Avidin-like / Avidin-like, conserved site / Avidin-like domain signature. / Avidin / Avidin/streptavidin / Avidin-like superfamily / Avidin family / Avidin-like domain profile. / Lipocalin / Beta Barrel / Mainly Beta
Similarity search - Domain/homology
Biological speciesStreptomyces avidinii (bacteria)
MethodX-RAY DIFFRACTION / Resolution: 1.39 Å
AuthorsKatz, B.A.
Citation
Journal: J.Mol.Biol. / Year: 1997
Title: Binding of biotin to streptavidin stabilizes intersubunit salt bridges between Asp61 and His87 at low pH.
Authors: Katz, B.A.
#1: Journal: J.Biol.Chem. / Year: 1997
Title: In Crystals of Complexes of Streptavidin with Peptide Ligands Containing the Hpq Sequence the Pka of the Peptide Histidine is Less Than 3.0
Authors: Katz, B.A. / Cass, R.T.
#2: Journal: J.Am.Chem.Soc. / Year: 1996
Title: Structure-Based Design Tools: Structural and Thermodynamic Comparison with Biotin of a Small Molecule that Binds Streptavidin with Micromolar Affinity
Authors: Katz, B.A. / Liu, B. / Cass, R.T.
#3: Journal: J.Am.Chem.Soc. / Year: 1996
Title: Preparation of a Protein-Dimerizing Ligand by Topochemistry and Structure-Based Design
Authors: Katz, B.A.
#4: Journal: J.Biol.Chem. / Year: 1995
Title: Topochemical Catalysis Achieved by Structure-Based Ligand Design
Authors: Katz, B.A. / Cass, R.T. / Liu, B. / Arze, R. / Collins, N.
#5: Journal: Chem.Biol. / Year: 1995
Title: Topochemistry for Preparing Ligands that Dimerize Receptors
Authors: Katz, B.A. / Stroud, R.M. / Collins, N. / Liu, B. / Arze, R.
#6: Journal: Biochemistry / Year: 1995
Title: Binding to Protein Targets of Peptidic Leads Discovered by Phage Display: Crystal Structures of Streptavidin-Bound Linear and Cyclic Peptide Ligands Containing the Hpq Sequence
Authors: Katz, B.A.
#7: Journal: J.Am.Chem.Soc. / Year: 1995
Title: Structure-Based Design of High Affinity Streptavidin Binding Cyclic Peptide Ligands Containing Thioether Cross-Links
Authors: Katz, B.A. / Johnson, C.R. / Cass, R.T.
History
DepositionSep 11, 1997Processing site: BNL
Revision 1.0Oct 14, 1998Provider: repository / Type: Initial release
Revision 1.1Mar 25, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Derived calculations / Version format compliance
Revision 1.3Nov 16, 2011Group: Atomic model
Revision 2.0Feb 21, 2024Group: Atomic model / Data collection ...Atomic model / Data collection / Database references / Derived calculations / Other / Refinement description
Category: atom_site / chem_comp_atom ...atom_site / chem_comp_atom / chem_comp_bond / database_2 / pdbx_database_status / software / struct_site
Item: _atom_site.occupancy / _database_2.pdbx_DOI ..._atom_site.occupancy / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_database_status.process_site / _software.name / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: STREPTAVIDIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)14,3733
Polymers14,1811
Non-polymers1922
Water95553
1
A: STREPTAVIDIN
hetero molecules

A: STREPTAVIDIN
hetero molecules

A: STREPTAVIDIN
hetero molecules

A: STREPTAVIDIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)57,49412
Polymers56,7254
Non-polymers7698
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation8_555-y,-x,-z1
crystal symmetry operation10_555-x,-y,z1
crystal symmetry operation15_555y,x,-z1
Buried area11240 Å2
ΔGint-234 kcal/mol
Surface area19190 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)58.150, 58.150, 173.880
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number98
Space group name H-MI4122
Components on special symmetry positions
IDModelComponents
11A-195-

HOH

21A-195-

HOH

31A-204-

HOH

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Components

#1: Protein STREPTAVIDIN /


Mass: 14181.324 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Streptomyces avidinii (bacteria) / References: UniProt: P22629
#2: Chemical ChemComp-SO4 / SULFATE ION / Sulfate


Mass: 96.063 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: SO4
#3: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 53 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.89 Å3/Da / Density % sol: 37.1 %
Description: REJECTION CRITERIA: (I(H)I - ) > [0.30 * () + 0.10*I(H)I], WHERE I(H)I IS THE ITH OBSERVATION OF THE INTENSITY OF REFLECTION H (M.G.ROSSMANN, A.G.W.LESLIE, S.S.ABDEL-MEGUID, T.TSUKIHARA, ...Description: REJECTION CRITERIA: (I(H)I - ) > [0.30 * () + 0.10*I(H)I], WHERE I(H)I IS THE ITH OBSERVATION OF THE INTENSITY OF REFLECTION H (M.G.ROSSMANN, A.G.W.LESLIE, S.S.ABDEL-MEGUID, T.TSUKIHARA, J.APPL.CRYST. 12, 570 - 581). THIS REJECTION CRITERION IS THE DEFAULT OF THE MSC PROGRAM BIOTEX.
Crystal growpH: 2.97
Details: SYNTHETIC MOTHER LIQUOR OF 75% SATURATED AMMONIUM SULFATE, 25% 1.0 M SODIUM FORMATE ADJUSTED TO PH 2.97.
Crystal
*PLUS
Crystal grow
*PLUS
Temperature: 20 ℃ / pH: 4.5 / Method: vapor diffusion, hanging drop / Details: Pahler, A., (1987) J. Biol. Chem., 262, 13933.
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
110-20 mg/mlprotein1drop
250 mMpotassium acetate1drop
3200 mM1dropNaCl
430 %satammonium sulfate1reservoir

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Data collection

DiffractionMean temperature: 273 K
Diffraction sourceWavelength: 1.5418
DetectorType: RIGAKU RAXIS IV / Detector: IMAGE PLATE
RadiationMonochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionNum. obs: 30482 / Redundancy: 4.1 % / Rmerge(I) obs: 0.066
Reflection
*PLUS
Highest resolution: 1.32 Å / Num. measured all: 123910

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Processing

Software
NameVersionClassification
X-PLORmodel building
X-PLORrefinement
bioteX(MSC)data reduction
bioteXdata scaling
X-PLORphasing
RefinementResolution: 1.39→7.5 Å / σ(F): 1.8
Details: THE FOLLOWING ATOMS HAD WEAK DENSITY AND OCCUPANCIES WERE REFINED: ALA 13, GLU 14, ALA 15 (EXCEPT FOR C AND O), GLN 24, LEU 25, GLY 26 ALA 35 (SIDE CHAIN), ASP 36 (N, HN, CA, HA, C, O, CB, ...Details: THE FOLLOWING ATOMS HAD WEAK DENSITY AND OCCUPANCIES WERE REFINED: ALA 13, GLU 14, ALA 15 (EXCEPT FOR C AND O), GLN 24, LEU 25, GLY 26 ALA 35 (SIDE CHAIN), ASP 36 (N, HN, CA, HA, C, O, CB, HB1, HB2, CG, OD1,OD2), GLU 44 (CG, HG1, HG2, CD, OE1, OE2) SER 45 (MAIN CHAIN), ALA 46 (CA, HA, C, O, CB, HB1, HB2, HB3), VAL 47, GLY 48 ASN 49, ALA 50, GLU 51, SER 52 (SIDE CHAIN), ARG 53 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) ARG 84 (CG, HG1, HG2, CD, HD1, HD2, NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) GLY 99, ALA 100 (MAIN CHAIN), ALA 100 (SIDE CHAIN), GLU 101 (N, HN, CA, HA, CB, HB1, HB2, C, O, CG, HG1, HG2, CD, OE1, OE2) ARG 103 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22), GLU 116 (N, HN, CA, HA, CB, HB1, HB2, CG, HG1, HG2, C, O, CD, OE1, OE2) ALA 117, ASN 118 (SIDE CHAIN), LYS 121 (CG, HG1, HG2, CD, HD1, HD2, CE, HE1, HE2, NZ, HZ1,HZ2, HZ3) RESIDUES TYR 60 TO SER 69 WERE REFINED IN 2 CONFORMATIONS BECAUSE UPON PROTONATION OF ASP 61 AT LOW PH, ASP 61 UNDERGOES A LARGE SHIFT IN CONFORMATION AND CHANGE IN HYDROGEN BONDING. THE LOOP COMPRISING RESIDUES ASP 61 TO SER 69 ALSO UNDERGO CORRESPONDING CONFORMATIONAL CHANGES. HOWEVER SOME OF THESE RESIDUES ARE DISORDERED AND NOT VISIBLE IN EITHER CONFORMATION. DISCRETELY DISORDERED SIDE CHAINS WHOSE OCCUPANCIES AND STRUCTURES WERE SIMULTANEOUSLY REFINED ARE: SER 45, LEU 73, HIS 87, GLN 107, LEU 110, LYS 132. DISORDERED SOLVENTS ARE: HOH 134 WHICH OCCUPIES THE SPACE AVAILABLE WHEN ASP 61 IS IN CONFORMATION NUMBER 2 HOH 142 WHICH IS CLOSE TO A SYMMETRY-RELATED EQUIVALENT OF ITSELF HOH 150 WHICH IS CLOSE TO HOH 151 SO4 153 WHICH IS CLOSE TO HOH 545 HOH 152 WHICH IS CLOSE TO SO4 154 HOH 207 WHICH IS CLOSE TO A SYMMETRY-RELATED EQUIVALENT OF HOH 354 HOH 305 WHICH IS CLOSE TO A SYMMETRY-RELATED EQUIVALENT OF ITSELF HOH 546 WHICH IS CLOSE TO A SYMMETRY-RELATED EQUIVALENT OF ITSELF HOH 550 WHICH IS CLOSE TO A SYMMETRY-RELATED EQUIVALENT OF ITSELF HOH 635 WHICH IS CLOSE TO A SYMMETRY-RELATED EQUIVALENT OF ITSELF THE FOLLOWING ATOMS HAD WEAK DENSITY AND OCCUPANCIES WERE REFINED: ALA 13 GLU 14 ALA 15 (EXCEPT FOR C AND O) GLN 24 LEU 25 GLY 26 ALA 35 (SIDE CHAIN) ASP 36 (N, HN, CA, HA, C, O, CB, HB1, HB2, CG, OD1,OD2) GLU 44 (CG, HG1, HG2, CD, OE1, OE2) SER 45 (MAIN CHAIN) ALA 46 (CA, HA, C, O, CB, HB1, HB2, HB3) VAL 47 GLY 48 ASN 49 ALA 50 GLU 51 SER 52 (SIDE CHAIN) ARG 53 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) ARG 84 (CG, HG1, HG2, CD, HD1, HD2, NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) GLY 99 ALA 100 (MAIN CHAIN) ALA 100 (SIDE CHAIN) GLU 101 (N, HN, CA, HA, CB, HB1, HB2, C, O, CG, HG1, HG2, CD, OE1, OE2) ARG 103 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) GLU 116 (N, HN, CA, HA, CB, HB1, HB2, CG, HG1, HG2, C, O, CD, OE1, OE2) ALA 117 ASN 118 (SIDE CHAIN) LYS 121 (CG, HG1, HG2, CD, HD1, HD2, CE, HE1, HE2, NZ, HZ1, HZ2, HZ3) RESIDUES TYR 60 TO SER 69 WERE REFINED IN 2 CONFORMATIONS BECAUSE UPON PROTONATION OF ASP 61 AT LOW PH, ASP 61 UNDERGOES A LARGE SHIFT IN CONFORMATION AND CHANGE IN HYDROGEN BONDING. THE LOOP COMPRISING RESIDUES ASP 61 TO SER 69 ALSO UNDERGO CORRESPONDING CONFORMATIONAL CHANGES. HOWEVER SOME OF THESE RESIDUES ARE DISORDERED AND NOT VISIBLE IN EITHER CONFORMATION.
RfactorNum. reflection% reflection
Rfree0.238 --
Rwork0.206 --
obs0.206 20802 69 %
Refinement stepCycle: LAST / Resolution: 1.39→7.5 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms901 0 10 53 964
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.019
X-RAY DIFFRACTIONx_bond_d_na
X-RAY DIFFRACTIONx_bond_d_prot
X-RAY DIFFRACTIONx_angle_d
X-RAY DIFFRACTIONx_angle_d_na
X-RAY DIFFRACTIONx_angle_d_prot
X-RAY DIFFRACTIONx_angle_deg4.2
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d25.3
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_d_na
X-RAY DIFFRACTIONx_improper_angle_d_prot
X-RAY DIFFRACTIONx_mcbond_it
X-RAY DIFFRACTIONx_mcangle_it
X-RAY DIFFRACTIONx_scbond_it
X-RAY DIFFRACTIONx_scangle_it
LS refinement shellResolution: 1.39→1.45 Å / % reflection obs: 30.1 %
Software
*PLUS
Name: X-PLOR / Classification: refinement
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_deg25.3
LS refinement shell
*PLUS
Rfactor obs: 0.206

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