BoundWaterEnvironment.interact: Bound Water Environment (interactions)
In vanddraabe: Identification and Statistical Analysis of Conserved Waters Near Proteins

Description Usage Arguments Details Value Author(s) References See Also Examples

Various enviroment counts for bound waters.

1 2	BoundWaterEnvironment.interact(distances, set.oi.idc, names.atoms, names.res.atoms, radius = 3.6)

`distances`	Matrix of atomic pairwise distances
`set.oi.idc`	Indices of protein atoms; can also HETATMs if those are of interest
`names.atoms`	Atom names from the PDB file in the PDB atomic naming convention.
`names.res.atoms`	Atom names of the form "RES AT"; created by combining the residue and atom name while separating the two by a space. These do not need to be unique because these names will be used to lookup hydrophilicity values.
`radius`	Distance in Angstroms between the atoms of interest; default: 3.6 Angstroms

For the heavy atoms near each water molecule (oxygen atom) the bound water environment is calculated. These values are defined in the Return section. The default radius distance is 3.6 Angstroms. While it is possible to define the radius to a value other than 3.6 this value is hardcoded into the ConservedWaters() function. This might change in future versions.

NOTE: This function is designed to work with ConservedWaters() via the base::apply() function processing rows (the MARGIN = 1 option). For this reason it is NOT a public function. The Nearby() is specifically designed to work with this function.

A list of the bound water environment values for nearby heavy atoms.

adn: num of nearby heavy atoms
ahp.sum: sum of hydrodrophilicy values
ahp.mu: mean of hydrodrophilicy values
ahp.sd: standard deviation of hydrodrophilicy values
hbonds: number of possible hydrogen bonds

Emilio Xavier Esposito emilio@exeResearch.com

Paul C Sanschagrin and Leslie A Kuhn. Cluster analysis of consensus water sites in thrombin and trypsin shows conservation between serine proteases and contributions to ligand specificity. Protein Science, 1998, 7 (10), pp 2054-2064. DOI: 10.1002/pro.5560071002 PMID: 9792092 WatCH webpage

Leslie A Kuhn, Craig A Swanson, Michael E Pique, John A Tainer, and Elizabeth D Getzof. Atomic and Residue Hydrophilicity in the Context of Folded Protein Structures. PROTEINS: Structure, Function, and Genetics, 1995, 2 (4), pp 536-547. DOI: 10.1002/prot.340230408 PMID: 8749849

Other "Bound Water Environment": BoundWaterEnvironment.quality, BoundWaterEnvironment, Mobility, NormalizedBvalue, calcBvalue, calcNearbyHydrationFraction, calcNumHydrogenBonds

  ## Not run: 
  distances <- PDB.1hai.h2o.prot.dists[3, ]
  set.oi.idc <- prot.idc
  names.atoms <- PDB.1hai.aoi.clean$elety[prot.idc]
  names.res.atoms <- paste(PDB.1hai.aoi.clean$resid[prot.idc], names.atoms, sep =" ")
  BoundWaterEnvironment.interact(distances,
                                 set.oi.idc,
                                 names.atoms,
                                 names.res.atoms,
                                 radius = 3.6)
  # $adn
  # [1] 9
  #
  # $ahp.sum
  # [1] 2.001
  #
  # $ahp.mu
  # [1] 0.2223
  #
  # $ahp.sd
  # [1] 0.2229
  #
  # $hbonds
  # [1] 4
  
## End(Not run)