core::sequence::ProfSimScoringScheme Class Reference

#include <ProfSimScoringScheme.hh>

Inheritance diagram for core::sequence::ProfSimScoringScheme:

Collaboration diagram for core::sequence::ProfSimScoringScheme:

Public Member Functions
	ProfSimScoringScheme (Real open=-4, Real extend=-1)
	constructor More...
virtual	~ProfSimScoringScheme ()
	destructor More...
void	initialize_parameters ()
	Initialize log-probabilities of occurence for each amino acid. More...
virtual ScoringSchemeOP	clone () const
	returns owning pointer to a new object with a deep copy of this object's values. More...
virtual Real	score (SequenceOP seq1, SequenceOP seq2, Size pos1, Size pos2)
	ProfSim profile-profile similarity metric based on information theory. Published by Yona and Levitt in JMB, 2002 in a paper titled "Within the Twilight Zone: A Sensitive Profile-Profile Comparison Tool Based on Information Theory.". More...
Public Member Functions inherited from core::sequence::ScoringScheme
	ScoringScheme ()
	ctor More...
virtual	~ScoringScheme ()
	dtor More...
virtual void	read_from_file (utility::file::FileName const &)
	Initialize from a file. More...
virtual void	read_data (utility::io::izstream &)
virtual Real	gap_open () const
	Gets the gap opening penalty. More...
virtual Real	gap_extend () const
	Gets the gap extension penalty. More...
void	gap_open (Real const gap_open)
	Sets the gap opening penalty. More...
void	gap_extend (Real const gap_extend)
	Sets the gap extension penalty. More...
std::string	type () const
	getters for type, which is a unique string name for this object. More...
void	type (std::string new_type)
	getters for type, which is a unique string name for this object. More...
void	unimplemented_method_error (std::string const &method_name) const
	Utility method for producing useful error messages and exiting from program. Declared const which is funny, because exiting the program certainly changes the state of this object! This might be replaced with exception handling if we ever start using those. More...
bool	is_good (Real const &num)

Private Attributes
utility::vector1< core::Real >	prior_probs_

Detailed Description

Definition at line 31 of file ProfSimScoringScheme.hh.

Constructor & Destructor Documentation

core::sequence::ProfSimScoringScheme::ProfSimScoringScheme ( Real  open = -4, Real  extend = -1  )

inline

constructor

Definition at line 35 of file ProfSimScoringScheme.hh.

References protocols::loops::extend, core::sequence::ScoringScheme::gap_extend(), core::sequence::ScoringScheme::gap_open(), initialize_parameters(), and core::sequence::ScoringScheme::type().

Referenced by clone().

virtual core::sequence::ProfSimScoringScheme::~ProfSimScoringScheme ( )

inlinevirtual

destructor

Definition at line 47 of file ProfSimScoringScheme.hh.

Member Function Documentation

virtual ScoringSchemeOP core::sequence::ProfSimScoringScheme::clone ( ) const

inlinevirtual

returns owning pointer to a new object with a deep copy of this object's values.

Implements core::sequence::ScoringScheme.

Definition at line 54 of file ProfSimScoringScheme.hh.

References core::sequence::ScoringScheme::gap_extend(), core::sequence::ScoringScheme::gap_open(), and ProfSimScoringScheme().

void core::sequence::ProfSimScoringScheme::initialize_parameters

(

)

Initialize log-probabilities of occurence for each amino acid.

Definition at line 45 of file ProfSimScoringScheme.cc.

References core::chemical::aa_from_oneletter_code(), core::sequence::end, and prior_probs_.

Referenced by ProfSimScoringScheme().

Real core::sequence::ProfSimScoringScheme::score ( SequenceOP  seq1, SequenceOP  seq2, Size  pos1, Size  pos2  )

virtual

ProfSim profile-profile similarity metric based on information theory. Published by Yona and Levitt in JMB, 2002 in a paper titled "Within the Twilight Zone: A Sensitive Profile-Profile Comparison Tool Based on Information Theory.".

Detailed: The basic idea for this score is that it incorporates both

divergence of probability distributions at each position and the significance of that divergence in order to construct a position-specific profile-profile score. The divergence score is the J-S divergence between the two probability distributions at probability position, and the significance score is the J-S divergence between:

1. the average of the two probability distributions at this position
2. a prior probability distribution over all allowed characters at this position. J-S divergence between two distributions is defined as: D( p1, p2 ) = 0.5 * sum( p1[i] * log( p1[i] / p2[i] ) ) + 0.5 * sum( p2[i] * log( p2[i] / p1[i] ) )

Implements core::sequence::ScoringScheme.

Definition at line 85 of file ProfSimScoringScheme.cc.

References prior_probs_.

Member Data Documentation

utility::vector1< core::Real > core::sequence::ProfSimScoringScheme::prior_probs_

private

Definition at line 84 of file ProfSimScoringScheme.hh.

Referenced by initialize_parameters(), and score().

---

The documentation for this class was generated from the following files:

• src/core/sequence/ProfSimScoringScheme.hh
• src/core/sequence/ProfSimScoringScheme.cc