1R64

The 2.2 A crystal structure of Kex2 protease in complex with Ac-Arg-Glu-Lys-boroArg peptidyl boronic acid inhibitor

PDB DOI: https://doi.org/10.2210/pdb1R64/pdb

Classification: HYDROLASE/HYDROLASE INHIBITOR
Organism(s): Saccharomyces cerevisiae
Expression System: Saccharomyces cerevisiae
Mutation(s): No

Deposited: 2003-10-14 Released: 2004-03-09
Deposition Author(s): Holyoak, T., Kettner, C.A., Petsko, G.A., Fuller, R.S., Ringe, D.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.20 Å
R-Value Free: 0.234
R-Value Work: 0.197
R-Value Observed: 0.197

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 2.2 of the entry. See complete history.

Literature

Structural Basis for Differences in Substrate Selectivity in Kex2 and Furin Protein Convertases

Holyoak, T., Kettner, C.A., Petsko, G.A., Fuller, R.S., Ringe, D.

(2004) Biochemistry 43: 2412-2421

PubMed: 14992578 Search on PubMed
DOI: https://doi.org/10.1021/bi035849h
Primary Citation of Related Structures:
1R64

PubMed Abstract:
Kex2 is the yeast prototype of a large family of serine proteases that are highly specific for cleavage of their peptide substrates C-terminal to paired basic sites. This paper reports the 2.2 A resolution crystal structure of ssKex2 in complex with an Ac-Arg-Glu-Lys-Arg peptidyl boronic acid inhibitor (R = 19.7, R(free) = 23.4). By comparison of this structure with the structure of the mammalian homologue furin [Henrich, S., et al. (2003) Nat. Struct. Biol. 10, 520-526], we suggest a structural basis for the differences in substrate recognition at the P(2) and P(4) positions between Kex2 and furin and provide a structural rationale for the lack of P(6) recognition in Kex2. In addition, several monovalent cation binding sites are identified, and a mechanism of activation of Kex2 by potassium ion is proposed.

Organizational Affiliation

Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, Massachusetts 02454, USA.

Macromolecule Content

Total Structure Weight: 108.71 kDa
Atom Count: 8,397
Modelled Residue Count: 972
Deposited Residue Count: 972
Unique protein chains: 2

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Kexin	A, B	481	Saccharomyces cerevisiae	Mutation(s): 0 Gene Names: KEX2 OR QDS1 OR YNL238W OR N1122 EC: 3.4.21.61
UniProt
Find proteins for P13134 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P13134 Go to UniProtKB: P13134
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P13134
Sequence Annotations Expand
Reference Sequence

Find similar proteins by: Sequence | 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Ac-Arg-Glu-Lys-boroArg peptide inhibitor	C, D	5	N/A	Mutation(s): 0
Sequence Annotations Expand
Reference Sequence

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	E, F	2		N-Glycosylation	Interactions Focus chain E Focus chain F Interactions & Density Focus chain E Focus chain F
Glycosylation Resources
GlyTouCan: G42666HT GlyCosmos: G42666HT GlyGen: G42666HT

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
NAG Query on NAG Download Ideal Coordinates CCD File SDF format, chain G [auth A] SDF format, chain H [auth A] SDF format, chain O [auth B] MOL2 format, chain G [auth A] MOL2 format, chain H [auth A] MOL2 format, chain O [auth B]	G [auth A], H [auth A], O [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C₈ H₁₅ N O₆ OVRNDRQMDRJTHS-FMDGEEDCSA-N		Interactions Focus chain G [auth A] Focus chain H [auth A] Focus chain O [auth B] Interactions & Density Focus chain G [auth A] Focus chain H [auth A] Focus chain O [auth B]
BTB Query on BTB Download Ideal Coordinates CCD File SDF format, chain V [auth B] MOL2 format, chain V [auth B]	V [auth B]	2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL C₈ H₁₉ N O₅ OWMVSZAMULFTJU-UHFFFAOYSA-N		Interactions Focus chain V [auth B] Interactions & Density Focus chain V [auth B]
CA Query on CA Download Ideal Coordinates CCD File SDF format, chain I [auth A] SDF format, chain J [auth A] SDF format, chain K [auth A] SDF format, chain P [auth B] SDF format, chain Q [auth B] SDF format, chain R [auth B] MOL2 format, chain I [auth A] MOL2 format, chain J [auth A] MOL2 format, chain K [auth A] MOL2 format, chain P [auth B] MOL2 format, chain Q [auth B] MOL2 format, chain R [auth B]	I [auth A] J [auth A] K [auth A] P [auth B] Q [auth B] I [auth A], J [auth A], K [auth A], P [auth B], Q [auth B], R [auth B]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N		Interactions Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Focus chain P [auth B] Focus chain Q [auth B] Focus chain R [auth B] Interactions & Density Focus chain I [auth A] Focus chain J [auth A] Focus chain K [auth A] Focus chain P [auth B] Focus chain Q [auth B] Focus chain R [auth B]
K Query on K Download Ideal Coordinates CCD File SDF format, chain L [auth A] SDF format, chain M [auth A] SDF format, chain N [auth A] SDF format, chain S [auth B] SDF format, chain T [auth B] SDF format, chain U [auth B] MOL2 format, chain L [auth A] MOL2 format, chain M [auth A] MOL2 format, chain N [auth A] MOL2 format, chain S [auth B] MOL2 format, chain T [auth B] MOL2 format, chain U [auth B]	L [auth A] M [auth A] N [auth A] S [auth B] T [auth B] L [auth A], M [auth A], N [auth A], S [auth B], T [auth B], U [auth B]	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N		Interactions Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain S [auth B] Focus chain T [auth B] Focus chain U [auth B] Interactions & Density Focus chain L [auth A] Focus chain M [auth A] Focus chain N [auth A] Focus chain S [auth B] Focus chain T [auth B] Focus chain U [auth B]

Modified Residues 1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
BOR Query on BOR	C, D	PEPTIDE-LIKE	C₅ H₁₅ B N₄ O₂		ARG

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_000420 Query on PRD_000420	C, D	AC-ARG-GLU-LYS-BOROARG PEPTIDYL BORONIC ACID	Peptide-like / Inhibitor		Interactions Focus chain C Focus chain D Interactions & Density Focus chain C Focus chain D

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.20 Å
R-Value Free: 0.234
R-Value Work: 0.197
R-Value Observed: 0.197
Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 113.541	α = 90
b = 113.541	β = 90
c = 364.971	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

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Ligand Structure Quality Assessment

Entry History

Deposition Data

Released Date: 2004-03-09

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 2004-03-09
Type: Initial release
Version 1.1: 2008-04-29
Changes: Version format compliance
Version 1.2: 2011-07-13
Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
Version 1.3: 2011-11-16
Changes: Atomic model
Version 1.4: 2012-12-12
Changes: Other
Version 2.0: 2020-07-29
Type: Remediation
Reason: Carbohydrate remediation
Changes: Atomic model, Data collection, Derived calculations, Structure summary
Version 2.1: 2023-08-23
Changes: Data collection, Database references, Refinement description, Structure summary
Version 2.2: 2023-11-15
Changes: Data collection