- PDB-2m4e: Solution NMR structure of VV2_0175 from Vibrio vulnificus, NESG t... -
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Basic information
Entry
Database: PDB / ID: 2m4e
Title
Solution NMR structure of VV2_0175 from Vibrio vulnificus, NESG target VnR1 and CSGID target IDP91333
Components
Putative uncharacterized protein
Keywords
UNKNOWN FUNCTION / pathogenic bacterial protein / Structural Genomics / PSI-Biology / Northeast Structural Genomics Consortium / NESG / Ontario Centre for Structural Proteomics / OCSP / Center for Structural Genomics of Infectious Diseases / CSGID
Function / homology
Uncharacterised protein PF16691 family / Protein of unknown function DUF5062 / DUF5062 superfamily / Domain of unknown function (DUF5062) / Four Helix Bundle (Hemerythrin (Met), subunit A) / Up-down Bundle / Mainly Alpha / DUF5062 domain-containing protein / Uncharacterized protein
Method: simulated annealing / Software ordinal: 1 Details: The heterogeneity of viv0002 expressed in Escherichia coli BL21 (DE3) was observed. Three extra peaks in 15N HSQC and more than 25 extra peaks in 13C HSQC were identified. These peaks are ...Details: The heterogeneity of viv0002 expressed in Escherichia coli BL21 (DE3) was observed. Three extra peaks in 15N HSQC and more than 25 extra peaks in 13C HSQC were identified. These peaks are grouped into three fragments, one assigned as GlcNAc, the other two fragments could not be accurately assigned given the limited information we have, but they are likely to belong to glycans. These fragments display intra NOEs only and remain solvent exposed with strong and narrow line widths. NMR relaxation data showed that these unknown modifications are highly mobile and no interaction with viv0002. Heterologously expressed viv0002 was confirmed by LC-MS. A mass shift of 178 Da of 15N-labeled viv0002 was detected whereas a shift of 72 Da for 13C/15N-labeled sample. However, neither of results matches any three unknown fragments seen in the NMR spectrum with MW 202 Da, 155 Da and 204 Da, respectively. The nature and functional consequence of the unknown fragments/modifications to viv0002 are not understood at this stage. The structure deposited provides the basis of the future investigation.
NMR constraints
NOE constraints total: 2122 / NOE intraresidue total count: 384 / NOE long range total count: 687 / NOE medium range total count: 649 / NOE sequential total count: 402 / Hydrogen bond constraints total count: 70 / Protein chi angle constraints total count: 0 / Protein other angle constraints total count: 0 / Protein phi angle constraints total count: 57 / Protein psi angle constraints total count: 57
NMR representative
Selection criteria: lowest energy
NMR ensemble
Conformer selection criteria: structures with the lowest energy Conformers calculated total number: 100 / Conformers submitted total number: 20
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