Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4054
Number of amino acids:731
Molecular Weight:80995.7 Da
Theoretical pI:5.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)466.29%
Cysteine CYS (C)121.64%
Glutamic Acid GLU (E)395.34%
Aspartic Acid ASP (D)364.92%
Glycine GLY (G)7410.12%
Phynylalanine PHE (F)334.51%
Isoleucine ILE (I)405.47%
Histidine HIS (H)141.92%
Lysine LYS (K)435.88%
Methionine MET (M)172.33%
Leucine LEU (L)547.39%
Asparagine ASN (N)293.97%
Glutamine GLN (Q)263.56%
Proline PRO (P)435.88%
Serine SER (S)587.93%
Arginine ARG (R)192.6%
Threonine THR (T)486.57%
Tryptophan TRP (W)263.56%
Valine VAL (V)425.75%
Tyrosine TYR (Y)324.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3674
HydrogenH5528
NitrogenN940
OxygenO1075
SulphurS29

FormulaC3674H5528N940O1075S29
Total Number of Atoms:11246


Total number of positively charged residues (ARG + LYS):62
Total number of negatively charged residues (ASP + GLU):75
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    191430
Absorption 0.1% (=1 g/l)    2.363,   assuming all pairs of CYS residues form cystines

Ext. coefficient    190680
Absorption 0.1% (=1 g/l)    2.354,   assuming all CYS residues are reduced
Aromaticity:0.124

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.05, 27.91, 21.34]

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:73.1053
Grand average of hydropathicity (GRAVY):-0.27