Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4822
Number of amino acids:334
Molecular Weight:36220.7 Da
Theoretical pI:8.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)247.19%
Cysteine CYS (C)175.09%
Glutamic Acid GLU (E)72.1%
Aspartic Acid ASP (D)144.19%
Glycine GLY (G)3911.68%
Phynylalanine PHE (F)144.19%
Isoleucine ILE (I)154.49%
Histidine HIS (H)41.2%
Lysine LYS (K)92.69%
Methionine MET (M)61.8%
Leucine LEU (L)205.99%
Asparagine ASN (N)195.69%
Glutamine GLN (Q)175.09%
Proline PRO (P)247.19%
Serine SER (S)298.68%
Arginine ARG (R)205.99%
Threonine THR (T)236.89%
Tryptophan TRP (W)72.1%
Valine VAL (V)113.29%
Tyrosine TYR (Y)154.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1583
HydrogenH2412
NitrogenN454
OxygenO480
SulphurS23

FormulaC1583H2412N454O480S23
Total Number of Atoms:4952


Total number of positively charged residues (ARG + LYS):29
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    61850
Absorption 0.1% (=1 g/l)    1.708,   assuming all pairs of CYS residues form cystines

Ext. coefficient    60850
Absorption 0.1% (=1 g/l)    1.680,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.55, 33.23, 17.07]

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:57.6048
Grand average of hydropathicity (GRAVY):-0.39