BoundWaterEnvironment.quality: Bound Water Environment (atomic quality)

In vanddraabe: Identification and Statistical Analysis of Conserved Waters Near Proteins

Description

Various enviroment counts for bound waters.

Usage

BoundWaterEnvironment.quality(distances, set.oi.idc, structure,
  radius = 3.6)

Arguments

distances	Matrix of atomic pairwise distances
set.oi.idc	Indices of atoms of interest; can be protein, water, or HETATMs if those are of interest
structure	The protein structure of interest with its residue and atom names; X, Y, and Z coordinates; residue and atom numbers; and B-value, Normalized B-value, Occupancy, and Mobility values.
radius	Distance in Angstroms between the atoms of interest; default: 3.6 Angstroms

Details

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.

Value

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

• o.sum: sum of occupancy values

• o.mu: mean of occupancy values

• o.sd: standard deviation of occupancy values

• b.exp.sum: sum of experimental B-values

• b.exp.mu: mean of experimental B-values

• b.exp.sd: standard deviation of experimental B-values

• mobility.sum: sum of mobility values

• mobility.mu: mean of mobility values

• mobility.sd: standard deviation of mobility values

• nBvalue.sum: sum of normalized B-values

• nBvalue.mu: mean of normalized B-values

• nBvalue.sd: standard deviation of normalized B-values

Author(s)

Emilio Xavier Esposito [e-mail]

References

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

See Also

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

Examples

  ## Not run: 
  distances <- PDB.1hai.h2o.prot.dists[3, ]
  set.oi.idc <- prot.idc
  structure <- PDB.1hai.aoi.clean
  BoundWaterEnvironment.quality(distances,
                                set.oi.idc,
                                structure,
                                radius = 3.6)
  
## End(Not run)

vanddraabe documentation built on June 8, 2019, 1:03 a.m.