def calcOmega(piAcidCentroid, piResCentroid):
cent1cent2Vec = np.array(piResCentroid["coords"]) - np.array(
piAcidCentroid["coords"])
cent1cent2Vec = normalize(cent1cent2Vec)
planeNormVec = np.cross(cent1cent2Vec, piAcidCentroid["normVec"])
planeNormVec = normalize(planeNormVec)
return degrees(acos(np.inner(planeNormVec, piResCentroid["normVec"])))
def isFlat(allAtomsList, atomsIndList, substituents):
"""
Sprawdz czy wybrane atomy leza w jednej plaszczyznie.
Procedura: na podstawie polozen trzech pierwszych atomow wyznacza sie
wektor normalnych do wyznaczonej przez nich plaszczyzny. Nastepnie
sprawdzane jest czy kolejne wiazania tworza wektory prostopadle
do wektora normalnego. Dopuszczalne jest odchylenie 5 stopni.
TODO: Nie lepiej byloby obliczyc tensor momentu bezwladnosci,
zdiagonalizowac go i rozstrzygnac na podstawie jego wartosci wlasnych?
Wejscie:
allAtomsList - lista obiektow Atom (cala czasteczka)
atomsIndList - lista indeksow atomow, ktore maja byc zweryfikowane
pod wzgledem lezenia w jednej plaszczyznie
Wyjscie:
verdict - slownik, posiada klucze: isFlat (zmienna logiczna, True jesli
struktura jest plaska), normVec (3-elementowa lista float,
wspolrzedne wektora normalnego plaszczyzny, jesli struktura nie
jest plaska wszystkie jego wspolrzedne sa rowne 0)
"""
verdict = {'isFlat': False, 'normVec': [0, 0, 0]}
if len(atomsIndList) < 3:
print("Znaleziono 2-wu elementowy cykl!!!")
return verdict
norm_vec = getNormVec(allAtomsList, atomsIndList)
if len(atomsIndList) <= 3:
verdict['normVec'] = norm_vec
return verdict
centroid = getAverageCoords(allAtomsList, atomsIndList)
for i in range(1, len(atomsIndList)):
atomInd = atomsIndList[i]
D = np.array(allAtomsList[atomInd].get_coord())
new_vec = normalize(centroid - D)
if abs(np.inner(new_vec, norm_vec)) > 0.09:
return verdict
for substituentKey in substituents:
D = np.array(allAtomsList[substituentKey].get_coord())
E = np.array(allAtomsList[substituents[substituentKey]].get_coord())
new_vec = normalize(E - D)
if abs(np.inner(new_vec, norm_vec)) > 0.20:
return verdict
verdict['isFlat'] = True
verdict['normVec'] = norm_vec
verdict['coords'] = centroid
return verdict
def getNormVec(allAtomsList, atomsIndList):
norm_vec = np.array([0., 0., 0.])
expanded_list = atomsIndList + atomsIndList[:2]
for i in range(len(expanded_list) - 2):
A = np.array(allAtomsList[expanded_list[i]].get_coord())
B = np.array(allAtomsList[expanded_list[i + 1]].get_coord())
C = np.array(allAtomsList[expanded_list[i + 2]].get_coord())
vec1 = A - B
vec2 = B - C
norm_vec += normalize(np.cross(vec1, vec2))
return normalize(norm_vec)
def writeAnionPiLinearResults(self,
ligand,
centroid,
lineData,
modelIndex,
anionGroupId,
symmetrizeAlpha=False):
resultsFileName = self.linearAnionPiLog
ligandCode = ligand.get_resname()
ligandId = str(ligand.get_id()[1])
ligandChain = ligand.get_parent().get_id()
resultsFile = open(resultsFileName, "a+")
vector = lineData.atomsInvolved[1].get_coord(
) - lineData.atomsInvolved[0].get_coord()
vector = normalize(vector)
inner_prod = np.inner(vector, centroid["normVec"])
if abs(inner_prod) > 1.0:
if abs(inner_prod) < 1.1:
angle = 0
else:
angle = 666
else:
angle = degrees(acos(inner_prod))
if symmetrizeAlpha and angle > 90.0:
angle = 180 - angle
atom = lineData.atomsInvolved[0]
anion = atom.get_parent()
residueName = anion.get_resname()
anionChain = anion.get_parent().get_id()
anionId = str(anion.get_id()[1])
centroidCoords = centroid["coords"]
anionGroupCoords = getAverageCoords(
lineData.atomsInvolved, list(range(len(lineData.atomsInvolved))))
resultsFile.write(self.pdbCode + "\t")
resultsFile.write(ligandCode + "\t")
resultsFile.write(ligandChain + "\t")
resultsFile.write(ligandId + "\t")
resultsFile.write(str(centroid["cycleId"]) + "\t")
resultsFile.write(residueName + "\t")
resultsFile.write(anionChain + "\t")
resultsFile.write(anionId + "\t")
resultsFile.write(str(anionGroupId) + "\t")
resultsFile.write(str(angle) + "\t")
resultsFile.write(str(centroidCoords[0]) + "\t")
resultsFile.write(str(centroidCoords[1]) + "\t")
resultsFile.write(str(centroidCoords[2]) + "\t")
resultsFile.write(str(anionGroupCoords[0]) + "\t")
resultsFile.write(str(anionGroupCoords[1]) + "\t")
resultsFile.write(str(anionGroupCoords[2]) + "\t")
resultsFile.write(str(modelIndex) + "\n")
resultsFile.close()
def angleNormVecPoint(centroid, point):
coords = np.array(point)
centroidCoords = np.array(centroid["coords"])
normVec = centroid["normVec"]
centrAtomVec = normalize(coords - centroidCoords)
inner_prod = np.inner(normVec, centrAtomVec)
return degrees(acos(inner_prod))
def calcDirectionalVector(planeData, centroid):
vecCoords = []
for pointData in planeData.directionalVector:
kind = list(pointData.keys())[0]
if kind == "atom":
vecCoords.append(pointData[kind].get_coord())
elif kind == "center":
atomsList = pointData[kind]
vecCoords.append(
getAverageCoords(atomsList, list(range(len(atomsList)))))
elif kind == "closest":
atomsList = pointData[kind]
minDist = 1000
closestAtom = None
for atom in atomsList:
dist = atomDistanceFromCentroid(atom, centroid)
if dist < minDist:
minDist = dist
closestAtom = atom
vecCoords.append(closestAtom.get_coord())
vec = normalize(vecCoords[1] - vecCoords[0])
vec2 = normalize(np.array(centroid["coords"]) - vecCoords[1])
inner_prod = np.inner(vec, vec2)
if abs(inner_prod) > 1.0:
if abs(inner_prod) < 1.1:
return 0.0
else:
return 666.0
return degrees(acos(inner_prod))
def trigonal(self, atom):
number_of_protons_to_add = self.moleculeGraph.nodes[atom]["number_of_protons_to_add"]
if number_of_protons_to_add == 0:
return
rot_angle = math.radians(120.0)
bonded_atoms_ids = list(self.moleculeGraph.neighbors(atom))
if len(bonded_atoms_ids) == 0:
return
if len(bonded_atoms_ids) == 1:
A = self.atomList[atom].get_coord()
B = self.atomList[ bonded_atoms_ids[0] ].get_coord()
Bneighbors = list(self.moleculeGraph.neighbors(bonded_atoms_ids[0]))
for cCandidate in Bneighbors:
if cCandidate != atom and self.atomList[cCandidate].element in [ "N" , "C" ]:
C = self.atomList[cCandidate].get_coord()
norm_vec = -normalize(np.cross(A-B, B-C))
break
else:
norm_vec = normalize( np.cross( B-A, self.anionCoords - A ) )
# norm_vec = get_ortonormal(B-A)
bondDirection = B-A
for i in range(number_of_protons_to_add):
bondDirection = rotateVector(bondDirection, norm_vec, rot_angle)
bondDirection = normalize(bondDirection)* self.bond_lengths[ self.atomList[atom].element ]
newAtomCoords = A + bondDirection
self.hydrogenAtomsList.append(HydrogenAtom(newAtomCoords))
self.connected2H.append(atom)
elif len(bonded_atoms_ids) == 2:
A = self.atomList[atom].get_coord()
B = self.atomList[ bonded_atoms_ids[0] ].get_coord()
C = self.atomList[ bonded_atoms_ids[1] ].get_coord()
AB = normalize(B-A)
AC = normalize(C-A)
bondDirection = -(AB+AC)
bondDirection = normalize(bondDirection)* self.bond_lengths[ self.atomList[atom].element ]
newAtomCoords = A + bondDirection
self.hydrogenAtomsList.append(HydrogenAtom(newAtomCoords))
self.connected2H.append(atom)
return
def atomAngleNomVecCentroid(atom, centroid):
"""
Funkcja pomocnicza, oblicza kat pomiedzy kierunkiem od srodka
pierscienia do atomu a wektorem normalnym plaszczyzny pierscienia
Wejscie:
atom - obiekt Atom (Biopython)
centroid - slownik, klucze: coords, normVec
Wyjscie:
kat w stopniach
"""
atomCoords = np.array(atom.get_coord())
centroidCoords = np.array(centroid["coords"])
normVec = centroid["normVec"]
centrAtomVec = normalize(atomCoords - centroidCoords)
inner_prod = np.inner(normVec, centrAtomVec)
return degrees(acos(inner_prod))
def get_ortonormal(vec):
closest2zeroIndex = -1
dist = 100
for i, el in enumerate(vec):
if abs(el) < dist:
closest2zeroIndex = i
dist = abs(el)
vecOut = np.array([0.0, 0.0, 0.0])
aInd = (closest2zeroIndex+1)%3
bInd = (closest2zeroIndex+2)%3
if abs(vec[bInd]) < 0.001:
vecOut[bInd]=1
return vecOut
vecOut[aInd] =1
vecOut[bInd] = -vec[aInd]/vec[bInd]
return normalize(vecOut)
def tetrahedral(self, atom):
number_of_protons_to_add = self.moleculeGraph.nodes[atom]["number_of_protons_to_add"]
rot_angle = math.radians(109.5)
if number_of_protons_to_add == 0:
return
bonded_atoms_ids = list(self.moleculeGraph.neighbors(atom))
if len(bonded_atoms_ids) == 0:
return
if len(bonded_atoms_ids) == 1:
A = self.atomList[atom].get_coord()
B = self.atomList[ bonded_atoms_ids[0] ].get_coord()
# norm_vec = get_ortonormal(B-A)
norm_vec = normalize( np.cross( B-A, self.anionCoords - A ) )
dih_rot = math.radians(120)
bondDirection = rotateVector(B-A, norm_vec, rot_angle)
bondDirection = normalize(bondDirection)* self.bond_lengths[ self.atomList[atom].element ]
for i in range(number_of_protons_to_add):
newAtomCoords = A + bondDirection
self.hydrogenAtomsList.append(HydrogenAtom(newAtomCoords))
self.connected2H.append(atom)
bondDirection = rotateVector(bondDirection, B-A, dih_rot)
# 1 bond
elif len(bonded_atoms_ids) == 2:
A = self.atomList[atom].get_coord()
B = self.atomList[ bonded_atoms_ids[0] ].get_coord()
C = self.atomList[ bonded_atoms_ids[1] ].get_coord()
AB = normalize(B-A)
AC = normalize(C-A)
axis = AB+AC
bondDirection = rotateVector(-AB, axis, math.radians(90))
bondDirection = normalize(bondDirection)*self.bond_lengths[ self.atomList[atom].element ]
newAtomCoords = A + bondDirection
self.hydrogenAtomsList.append(HydrogenAtom(newAtomCoords))
self.connected2H.append(atom)
if number_of_protons_to_add > 1:
bondDirection = rotateVector(bondDirection, axis, math.radians(180))
newAtomCoords = A + bondDirection
self.hydrogenAtomsList.append(HydrogenAtom(newAtomCoords))
self.connected2H.append(atom)
elif len(bonded_atoms_ids) == 3:
A = self.atomList[atom].get_coord()
B = self.atomList[ bonded_atoms_ids[0] ].get_coord()
C = self.atomList[ bonded_atoms_ids[1] ].get_coord()
D = self.atomList[ bonded_atoms_ids[2] ].get_coord()
AB = normalize(B-A)
AC = normalize(C-A)
AD = normalize(D-A)
bondDirection = -(AB+AC+AD)
bondDirection = bondDirection*self.bond_lengths[ self.atomList[atom].element ]
newAtomCoords = A + bondDirection
self.hydrogenAtomsList.append(HydrogenAtom(newAtomCoords))
self.connected2H.append(atom)
return
def writeHbondsResults(self, hDonors, atom, modelIndex):
resultsFileName = self.hBondsLog
anionAtom = atom["Atom"]
anion = anionAtom.get_parent()
anionCode = anion.get_resname()
anionId = str(anion.get_id()[1])
anionChain = anion.get_parent().get_id()
anionCoord = anionAtom.get_coord()
resultsFile = open(resultsFileName, "a+")
for hDonData in hDonors:
hDon = hDonData["donor"]
distance = anionAtom - hDon
hDonCoords = hDon.get_coord()
hDonRes = hDon.get_parent()
residueName = hDonRes.get_resname()
resChain = hDonRes.get_parent().get_id()
resId = str(hDonRes.get_id()[1])
resultsFile.write(self.pdbCode + "\t")
resultsFile.write(anionCode + "\t")
resultsFile.write(anionChain + "\t")
resultsFile.write(anionId + "\t")
resultsFile.write(residueName + "\t")
resultsFile.write(resChain + "\t")
resultsFile.write(resId + "\t")
resultsFile.write(atom["AnionType"] + "\t")
resultsFile.write(anionAtom.element + "\t")
resultsFile.write(str(anionAtom.anionData.anionId) + "\t")
resultsFile.write(str(anionCoord[0]) + "\t")
resultsFile.write(str(anionCoord[1]) + "\t")
resultsFile.write(str(anionCoord[2]) + "\t")
resultsFile.write(hDon.element + "\t" + hDon.element + "\t")
resultsFile.write(str(hDonCoords[0]) + "\t")
resultsFile.write(str(hDonCoords[1]) + "\t")
resultsFile.write(str(hDonCoords[2]) + "\t")
hydrogenAtom = hDonData["hydrogen"]
hydrogenCoords = hydrogenAtom.get_coord()
resultsFile.write(str(hydrogenCoords[0]) + "\t")
resultsFile.write(str(hydrogenCoords[1]) + "\t")
resultsFile.write(str(hydrogenCoords[2]) + "\t")
resultsFile.write(str(hDonData["HFromExp"]) + "\t")
vec1 = normalize(anionCoord - hydrogenCoords)
vec2 = normalize(hDonCoords - hydrogenCoords)
angle = degrees(acos(np.inner(vec1, vec2)))
hDistance = anionAtom - hydrogenAtom
resultsFile.write(str(angle) + "\t")
resultsFile.write(str(hDistance) + "\t")
resultsFile.write(str(distance) + "\t")
resultsFile.write(str(modelIndex) + "\n")
resultsFile.close()
