Macromolecule Content

• Total Structure Weight: 17369.33 
• Atom Count: 1137 
• Residue Count: 154 
• Unique protein chains: 1

1XAX

NMR structure of HI0004, a putative essential gene product from Haemophilus influenzae

• DOI: 10.2210/pdb1XAX/pdb
• BMRB: 5942

• Classification: structural genomics unknown function
• Organism(s): Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd)
• Expression System: Escherichia coli


• Deposited: 2004-08-26 Released: 2005-01-18 
• Deposition Author(s): Yeh, D.C., Parsons, J.F., Parsons, L.M., Liu, F., Eisenstein, E., Orban, J., Structure 2 Function Project (S2F)

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Literature

NMR structure of HI0004, a putative essential gene product from Haemophilus influenzae, and comparison with the X-ray structure of an Aquifex aeolicus homolog

Yeh, D.C., Parsons, L.M., Parsons, J.F., Liu, F., Eisenstein, E., Orban, J.

(2005) Protein Sci. 14: 424-430

• PubMed: 15632286 
• DOI: 10.1110/ps.041096705


• PubMed Abstract: 
  

The solution structure of the 154-residue conserved hypothetical protein HI0004 has been determined using multidimensional heteronuclear NMR spectroscopy. HI0004 has sequence homologs in many organisms ranging from bacteria to humans and is believed to be essential in Haemophilus influenzae, although an exact function has yet to be defined. It has a alpha-beta-alpha sandwich architecture consisting of a central four-stranded beta-sheet with the alpha2-helix packed against one side of the beta-sheet and four alpha-helices (alpha1, alpha3, alpha4, alpha5) on the other side. There is structural homology with the eukaryotic matrix metalloproteases (MMPs), but little sequence similarity except for a conserved region containing three histidines that appears in both the MMPs and throughout the HI0004 family of proteins. The solution structure of HI0004 is compared with the X-ray structure of an Aquifex aeolicus homolog, AQ_1354, which has 36% sequence identity over 148 residues. Despite this level of sequence homology, significant differences exist between the two structures. These differences are described along with possible functional implications of the structures.

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Related Citations: 

• NMR assignment of the hypothetical protein HI0004 from Haemophilus Influenzae - a putative essential gene product
  Yeh, D.C.,Parsons, J.F.,Parsons, L.M.,Liu, F.,Eisenstein, E.,Orban, J.
  (2004) J.Biomol.NMR 29: 101




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Organizational Affiliation: 

Center for Advanced Research in Bio-technology, University of Maryland Biotechnology Institute, 9600 Gudel-sky Drive, Rockville, MD 20850, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Hypothetical UPF0054 protein HI0004	A	154	Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd)	Mutation(s): 0  Gene Names: ybeY EC: 3.1.-.-
Find proteins for P71335 (Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd)) Go to UniProtKB:  P71335

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 
• Olderado: 1XAX Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-08-26 
• Released Date: 2005-01-18 
• Deposition Author(s): Yeh, D.C., Parsons, J.F., Parsons, L.M., Liu, F., Eisenstein, E., Orban, J., Structure 2 Function Project (S2F)

Revision History 

• Version 1.0: 2005-01-18
  Type: Initial release
• Version 1.1: 2008-04-30
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance