Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5878
Number of amino acids:256
Molecular Weight:29210.78 Da
Theoretical pI:9.18


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)114.3%
Cysteine CYS (C)124.69%
Glutamic Acid GLU (E)103.91%
Aspartic Acid ASP (D)114.3%
Glycine GLY (G)124.69%
Phynylalanine PHE (F)124.69%
Isoleucine ILE (I)155.86%
Histidine HIS (H)51.95%
Lysine LYS (K)249.38%
Methionine MET (M)62.34%
Leucine LEU (L)2710.55%
Asparagine ASN (N)2610.16%
Glutamine GLN (Q)72.73%
Proline PRO (P)72.73%
Serine SER (S)218.2%
Arginine ARG (R)103.91%
Threonine THR (T)114.3%
Tryptophan TRP (W)20.78%
Valine VAL (V)155.86%
Tyrosine TYR (Y)124.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1297
HydrogenH2051
NitrogenN355
OxygenO376
SulphurS18

FormulaC1297H2051N355O376S18
Total Number of Atoms:4097


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29630
Absorption 0.1% (=1 g/l)    1.014,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28880
Absorption 0.1% (=1 g/l)    0.989,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.70

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.42, 25.78, 21.09]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:85.2736
Grand average of hydropathicity (GRAVY):-0.29