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- PDB-2rtc: APOSTREPTAVIDIN, PH 3.60, SPACE GROUP I222 -

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Basic information

Entry
Database: PDB / ID: 2rtc
TitleAPOSTREPTAVIDIN, PH 3.60, SPACE GROUP I222
ComponentsSTREPTAVIDIN
KeywordsBIOTIN-BINDING PROTEIN / APOSTREPTAVIDIN / PH 3.60
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 ...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: 1.5 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 1.3Feb 21, 2024Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Other / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_database_status / software / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._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
B: STREPTAVIDIN
D: STREPTAVIDIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)28,8437
Polymers28,3632
Non-polymers4805
Water2,000111
1
B: STREPTAVIDIN
D: STREPTAVIDIN
hetero molecules

B: STREPTAVIDIN
D: STREPTAVIDIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)57,68614
Polymers56,7254
Non-polymers96110
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation4_555x,-y,-z1
Buried area11310 Å2
ΔGint-262 kcal/mol
Surface area18610 Å2
MethodPISA
Unit cell
Length a, b, c (Å)95.180, 105.390, 47.890
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number23
Space group name H-MI222
Noncrystallographic symmetry (NCS)NCS oper: (Code: given
Matrix: (-0.999962, -0.016449, -0.002489), (-0.013581, 0.720683, 0.693131), (-0.009608, 0.693069, -0.720807)
Vector: 51.9873, 0.4453, 0.2723)

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Components

#1: Protein STREPTAVIDIN


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


Mass: 96.063 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: SO4
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 111 / 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: 2.12 Å3/Da / Density % sol: 20.6 %
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: 3.6
Details: SYNTHETIC MOTHER LIQUOR OF 75% SATURATED AMMONIUM SULFATE, SODIUM FORMATE ADJUSTED TO PH 3.60.
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 / Detector: IMAGE PLATE
RadiationMonochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionNum. obs: 40370 / Redundancy: 1.9 % / Rmerge(I) obs: 0.061
Reflection
*PLUS
Highest resolution: 1.32 Å / Num. measured all: 75219

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Processing

Software
NameVersionClassification
X-PLORmodel building
X-PLORrefinement
bioteX(MSC)data reduction
X-PLORphasing
RefinementResolution: 1.5→7.5 Å / σ(F): 1.9
Details: THE FOLLOWING ATOMS HAD WEAK DENSITY AND OCCUPANCIES WERE REFINED: ALA B 13 GLU B 14 ALA B 15 (EXCEPT C AND O), GLU B 51 (CG, HG1, HG2, CD, OE1, OE2) ARG B 53 (NE, HE, CZ, NH1, HH11, HH12, ...Details: THE FOLLOWING ATOMS HAD WEAK DENSITY AND OCCUPANCIES WERE REFINED: ALA B 13 GLU B 14 ALA B 15 (EXCEPT C AND O), GLU B 51 (CG, HG1, HG2, CD, OE1, OE2) ARG B 53 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) ARG B 84 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) GLY B 98 GLY B 99 ALA B 100 GLU B 101 ALA B 102 ARG B 103 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) GLU B 116 (CG, HG1, HG2, CD, OE1, OE2) PRO B 135 ALA D 13 GLU D 14 ALA D 15 ASP D 36 (CG, OD1, OD2) ARG D 53 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) ASN D 82 (CG, OD1, ND2, HD21, HD22) ARG D 84 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) GLU D 101 ARG D 103 (NE, HE, CZ, NH1, HH11, HH12, NH2, HH21, HH22) GLU D 116 (CG, HG1, HG2, CD, OE1, OE2) VAL D 133 RESIDUES TYR B 60 THROUGH SER B 69 AND TYR D 60 THROUGH SER D 69 WERE REFINED IN TWO CONFORMATIONS BECAUSE UPON PROTONATION OF ASP 61 AT LOW PH, ASP 61 UNDERGOES A LARGE SHIFT IN CONFORMATION AND CHANGE IN HYDROGEN BONDING. THE LOOPS COMPRISING RESIDUES ASP B 61 THROUGH SER B 69 AND ASP D 61 THROUGH SER D 69 ALSO UNDERGO CORRESPONDING CONFORMATIONAL CHANGES. HOWEVER SOME OF THESE RESIDUES ARE DISORDERED AND NOT VISIBLE IN EITHER CONFORMATION. TYR B 22 IS DISORDERED BETWEEN 2 CONFORMATIONS ONE OF WHICH OCCUPIES A SIMILAR REGION OF SPACE AS A 2-FOLD RELATED B 22. PROPER REFINEMENT WITH XPLOR IS NOT POSSIBLE BECAUSE OF THE OVERLAP OF ONE CONFORMER WITH THE SYMMETRY RELATED COUNTERPART. THE FOLLOWING WATERS WERE USED TO ACCOUNT FOR DENSITY DUE TO THIS CONFORMER OF TYR B 22: HOH 491, HOH 1460, HOH 1465. NO HYDROGENS ARE INCLUDED FOR THESE "WATERS".
RfactorNum. reflection% reflection
Rfree0.265 --
Rwork0.21 --
obs0.21 22599 60 %
Refinement stepCycle: LAST / Resolution: 1.5→7.5 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1819 0 25 111 1955
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_d24.6
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: 1.5→1.57 Å / % reflection obs: 27.5 %
Software
*PLUS
Name: X-PLOR / Classification: refinement
Refinement
*PLUS
Rfactor obs: 0.21 / Rfactor Rwork: 0.21
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_deg24.6
LS refinement shell
*PLUS
Rfactor obs: 0.206

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