Chem::Protein::SecondaryStructure

Returns the secondary structure by one-letter code.

Raises IndexError if code is invalid. See #code for a list of codes.

SecondaryStructure['H'] # => SecondaryStructure::RightHandedHelixAlpha
SecondaryStructure['h'] # => SecondaryStructure::LeftHandedHelixAlpha
SecondaryStructure['E'] # => SecondaryStructure::BetaStrand
SecondaryStructure['e'] # => SecondaryStructure::BetaStrand
SecondaryStructure['X'] # raises IndexError

Returns the secondary structure by one-letter code.

Returns nil if code is invalid. See #code for a list of codes.

SecondaryStructure['H']? # => SecondaryStructure::RightHandedHelixAlpha
SecondaryStructure['h']? # => SecondaryStructure::LeftHandedHelixAlpha
SecondaryStructure['E']? # => SecondaryStructure::BetaStrand
SecondaryStructure['e']? # => SecondaryStructure::BetaStrand
SecondaryStructure['X']? # => nil

Returns true if this enum value equals Bend

Returns true if this enum value equals BetaBridge

Returns true if this enum value equals BetaStrand

Returns one-letter secondary structure code.

Codes are a superset of those defined by DSSP:

• 'I' : Right-handed π-helix (5-turn)
• 'H' : Right-handed α-helix (4-turn)
• 'G' : Right-handed 3₁₀-helix (3-turn)
• 'F' : Right-handed 2.2₇ (2-turn)
• 'i' : Left-handed π-helix (5-turn)
• 'h' : Left-handed α-helix (4-turn)
• 'g' : Left-handed 3₁₀-helix (3-turn)
• 'f' : Left-handed 2.2₇ (2-turn)
• 'P' : Polyproline
• 'E' : β-strand
• 'B' : β-bridge
• 'T' : Turn
• 'S' : Bend
• '0' : None

Returns true if secondary structures are equal.

If strict is true, secondary structures are compared by their identity, otherwise they're compared by their computed type.

SecondaryStructure::RightHandedHelixAlpha.equals?(:right_handed_helix_alpha) # => true
SecondaryStructure::RightHandedHelixAlpha.equals?(:right_handed_helix_pi)    # => false
SecondaryStructure::RightHandedHelixAlpha.equals?(:left_handed_helix_alpha)  # => false
SecondaryStructure::BetaStrand.equals?(:polyproline)                         # => true
SecondaryStructure::BetaStrand.equals?(:bend)                                # => false

SecondaryStructure::RightHandedHelixAlpha.equals?(:right_handed_helix_pi, strict: false) # => true
SecondaryStructure::BetaStrand.equals?(:polyproline, strict: false)                      # => true
SecondaryStructure::BetaStrand.equals?(:bend, strict: false)                             # => false

Returns true if this enum value equals LeftHandedHelix3_10

Returns true if this enum value equals LeftHandedHelixAlpha

Returns true if this enum value equals LeftHandedHelixGamma

Returns true if this enum value equals LeftHandedHelixPi

Returns nominal secondary structure's minimum size.

Returns true if this enum value equals None

Returns true if this enum value equals Polyproline

Returns true if it's a regular secondary structure, otherwise false.

See also SecondaryStructureType#regular?.

SecondaryStructure::RightHandedHelixAlpha.regular? # => true
SecondaryStructure::LeftHandedHelixAlpha.regular?  # => true
SecondaryStructure::BetaStrand.regular?            # => true
SecondaryStructure::Turn.regular?                  # => false
SecondaryStructure::Bend.regular?                  # => false

Returns true if this enum value equals RightHandedHelix3_10

Returns true if this enum value equals RightHandedHelixAlpha

Returns true if this enum value equals RightHandedHelixGamma

Returns true if this enum value equals RightHandedHelixPi

Returns true if this enum value equals Turn

Returns secondary structure type.

SecondaryStructure::RightHandedHelixAlpha.type # => Helical
SecondaryStructure::LeftHandedHelixAlpha.type  # => Helical
SecondaryStructure::BetaStrand.type            # => Extended
SecondaryStructure::Turn.type                  # => Coil
SecondaryStructure::Bend.type                  # => Coil