Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4002
Number of amino acids:627
Molecular Weight:69079.66 Da
Theoretical pI:8.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)629.89%
Cysteine CYS (C)50.8%
Glutamic Acid GLU (E)193.03%
Aspartic Acid ASP (D)304.78%
Glycine GLY (G)6310.05%
Phynylalanine PHE (F)213.35%
Isoleucine ILE (I)203.19%
Histidine HIS (H)101.59%
Lysine LYS (K)386.06%
Methionine MET (M)101.59%
Leucine LEU (L)609.57%
Asparagine ASN (N)264.15%
Glutamine GLN (Q)325.1%
Proline PRO (P)294.63%
Serine SER (S)609.57%
Arginine ARG (R)223.51%
Threonine THR (T)294.63%
Tryptophan TRP (W)152.39%
Valine VAL (V)274.31%
Tyrosine TYR (Y)497.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3127
HydrogenH4710
NitrogenN824
OxygenO922
SulphurS15

FormulaC3127H4710N824O922S15
Total Number of Atoms:9598


Total number of positively charged residues (ARG + LYS):60
Total number of negatively charged residues (ASP + GLU):49
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    155760
Absorption 0.1% (=1 g/l)    2.255,   assuming all pairs of CYS residues form cystines

Ext. coefficient    155510
Absorption 0.1% (=1 g/l)    2.251,   assuming all CYS residues are reduced
Aromaticity:0.136

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.57

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.62, 28.39, 24.08]

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:72.1372
Grand average of hydropathicity (GRAVY):-0.38