Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4156
Number of amino acids:577
Molecular Weight:63679.88 Da
Theoretical pI:8.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)559.53%
Cysteine CYS (C)81.39%
Glutamic Acid GLU (E)183.12%
Aspartic Acid ASP (D)254.33%
Glycine GLY (G)396.76%
Phynylalanine PHE (F)274.68%
Isoleucine ILE (I)203.47%
Histidine HIS (H)213.64%
Lysine LYS (K)172.95%
Methionine MET (M)172.95%
Leucine LEU (L)417.11%
Asparagine ASN (N)264.51%
Glutamine GLN (Q)193.29%
Proline PRO (P)508.67%
Serine SER (S)295.03%
Arginine ARG (R)325.55%
Threonine THR (T)467.97%
Tryptophan TRP (W)101.73%
Valine VAL (V)559.53%
Tyrosine TYR (Y)223.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2874
HydrogenH4405
NitrogenN787
OxygenO806
SulphurS25

FormulaC2874H4405N787O806S25
Total Number of Atoms:8897


Total number of positively charged residues (ARG + LYS):49
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    88280
Absorption 0.1% (=1 g/l)    1.386,   assuming all pairs of CYS residues form cystines

Ext. coefficient    87780
Absorption 0.1% (=1 g/l)    1.378,   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 : 38.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.33, 24.96, 22.70]

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:78.4055
Grand average of hydropathicity (GRAVY):-0.12