PeptideAndProteinQuant.h

Go to the documentation of this file.

// Copyright (c) 2002-present, OpenMS Inc. -- EKU Tuebingen, ETH Zurich, and FU Berlin
// SPDX-License-Identifier: BSD-3-Clause
//
// --------------------------------------------------------------------------
// $Maintainer: Hendrik Weisser $
// $Authors: Hendrik Weisser $
// --------------------------------------------------------------------------
 
#pragma once
 
#include <OpenMS/DATASTRUCTURES/DefaultParamHandler.h>
#include <OpenMS/KERNEL/ConsensusMap.h>
#include <OpenMS/KERNEL/FeatureMap.h>
#include <OpenMS/METADATA/PeptideIdentification.h>
#include <OpenMS/METADATA/PeptideIdentificationList.h>
#include <OpenMS/METADATA/ProteinIdentification.h>
#include <OpenMS/METADATA/ExperimentalDesign.h>
 
 
namespace OpenMS
{
  class OPENMS_DLLAPI PeptideAndProteinQuant :
    public DefaultParamHandler
  {
public:
 
    typedef std::map<UInt64, double> SampleAbundances;
 
    struct PeptideData
    {
      std::map<Int, std::map<String, std::map<Int, std::map<UInt, double>>>> abundances;
 
      std::map<Int, std::map<String, std::map<Int, UInt64>>> psm_counts;
 
      SampleAbundances total_abundances;
 
      SampleAbundances total_psm_counts;
 
      std::set<String> accessions;
 
      Size psm_count = 0;
 
      PeptideData() = default;
    };
 
    typedef std::map<AASequence, PeptideData> PeptideQuant;
 
    struct ProteinData
    {
      std::map<String, SampleAbundances> peptide_abundances;
 
      std::map<String, SampleAbundances> peptide_psm_counts;
 
      std::map<String, std::map<UInt, double>> channel_level_abundances;
 
      std::map<String, UInt64> file_level_psm_counts;
 
      SampleAbundances total_abundances;
 
      SampleAbundances total_psm_counts;
 
      SampleAbundances total_distinct_peptides;
 
      Size psm_count = 0;
 
      ProteinData() = default;
    };
 
    typedef std::map<String, ProteinData> ProteinQuant;
 
    struct Statistics
    {
      Size n_samples;
 
      Size n_fractions;
 
      Size n_ms_files;
 
      Size quant_proteins, too_few_peptides;
 
      Size quant_peptides, total_peptides;
 
      Size quant_features, total_features, blank_features, ambig_features;
 
      Statistics() :
        n_samples(0), quant_proteins(0), too_few_peptides(0),
        quant_peptides(0), total_peptides(0), quant_features(0),
        total_features(0), blank_features(0), ambig_features(0) {}
    };
 
    PeptideAndProteinQuant();
 
    ~PeptideAndProteinQuant() override {}
 
    void readQuantData(FeatureMap& features, const ExperimentalDesign& ed);
 
    void readQuantData(ConsensusMap& consensus, const ExperimentalDesign& ed);
 
    void readQuantData(std::vector<ProteinIdentification>& proteins,
                       PeptideIdentificationList& peptides,
                       const ExperimentalDesign& ed);
 
    void quantifyPeptides(const PeptideIdentificationList& peptides =
                          PeptideIdentificationList());
 
 
    void quantifyProteins(const ProteinIdentification& proteins = ProteinIdentification());
 
 
    std::map<OpenMS::String, OpenMS::String> mapAccessionToLeader(const OpenMS::ProteinIdentification& proteins) const;
 
    const Statistics& getStatistics();
 
    const PeptideQuant& getPeptideResults();
 
    const ProteinQuant& getProteinResults();
 
    void annotateQuantificationsToProteins(
      const ProteinQuant& protein_quants, 
      ProteinIdentification& proteins,
      bool remove_unquantified = true);
 
private:
 
    Statistics stats_;
 
    PeptideQuant pep_quant_;
 
    ProteinQuant prot_quant_;
 
    ExperimentalDesign experimental_design_;
 
 
    PeptideHit getAnnotation_(PeptideIdentificationList& peptides);
 
    void quantifyFeature_(const FeatureHandle& feature,
      size_t fraction,
      const String& filename,
      const PeptideHit& hit,
      UInt channel_or_label);
 
    bool getBest_(
      const std::map<Int, std::map<String, std::map<Int, std::map<UInt, double>>>> & peptide_abundances,
      std::tuple<size_t, String, size_t, UInt> & best);
 
    template <typename T>
    void orderBest_(const std::map<T, SampleAbundances> & abundances,
                    std::vector<T>& result)
    {
      typedef std::pair<Size, double> PairType;
      std::multimap<PairType, T, std::greater<PairType> > order;
      for (typename std::map<T, SampleAbundances>::const_iterator ab_it =
             abundances.begin(); ab_it != abundances.end(); ++ab_it)
      {
        double total = 0.0;
        for (SampleAbundances::const_iterator samp_it = ab_it->second.begin();
             samp_it != ab_it->second.end(); ++samp_it)
        {
          total += samp_it->second;
        }
        if (total <= 0.0) continue;         // not quantified
        PairType key = std::make_pair(ab_it->second.size(), total);
        order.insert(std::make_pair(key, ab_it->first));
      }
      result.clear();
      for (typename std::multimap<PairType, T, std::greater<PairType> >::
           iterator ord_it = order.begin(); ord_it != order.end(); ++ord_it)
      {
        result.push_back(ord_it->second);
      }
    }
 
 
 
    void normalizePeptides_();
 
    void transferPeptideDataToProteins_(const ProteinIdentification& proteins);
 
    std::vector<String> selectPeptidesForQuantification_(const String& protein_accession,
                                                        Size top_n,
                                                        bool fix_peptides);
 
    double aggregateAbundances_(const std::vector<double>& abundances,
                               const String& method) const;
 
    void calculateProteinAbundances_(const String& protein_accession,
                                    const std::vector<String>& selected_peptides,
                                    const String& aggregate_method,
                                    Size top_n,
                                    bool include_all);
 
    void calculateFileAndChannelLevelProteinAbundances_(const String& protein_accession,
                                           const std::vector<String>& selected_peptides,
                                           const String& aggregate_method,
                                           Size top_n,
                                           bool include_all,
                                           const std::map<String, String>& accession_to_leader);
 
    void performIbaqNormalization_(const ProteinIdentification& proteins);
 
    String getAccession_(const std::set<String>& pep_accessions,
                         const std::map<String, String>& accession_to_leader) const;
 
    void countPeptides_(PeptideIdentificationList& peptides);
 
    size_t getSampleIDFromFilenameAndChannel_(const String& filename,
                                           UInt channel_or_label,
                                           const ExperimentalDesign& ed) const;
 
    void updateMembers_() override;
 
  };   // class
 
} // namespace