Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4557
Number of amino acids:673
Molecular Weight:75674.38 Da
Theoretical pI:5.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)405.94%
Cysteine CYS (C)81.19%
Glutamic Acid GLU (E)385.65%
Aspartic Acid ASP (D)375.5%
Glycine GLY (G)527.73%
Phynylalanine PHE (F)314.61%
Isoleucine ILE (I)446.54%
Histidine HIS (H)172.53%
Lysine LYS (K)334.9%
Methionine MET (M)131.93%
Leucine LEU (L)7411%
Asparagine ASN (N)324.75%
Glutamine GLN (Q)213.12%
Proline PRO (P)365.35%
Serine SER (S)558.17%
Arginine ARG (R)274.01%
Threonine THR (T)263.86%
Tryptophan TRP (W)162.38%
Valine VAL (V)426.24%
Tyrosine TYR (Y)314.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3447
HydrogenH5268
NitrogenN890
OxygenO989
SulphurS21

FormulaC3447H5268N890O989S21
Total Number of Atoms:10615


Total number of positively charged residues (ARG + LYS):60
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    134690
Absorption 0.1% (=1 g/l)    1.780,   assuming all pairs of CYS residues form cystines

Ext. coefficient    134190
Absorption 0.1% (=1 g/l)    1.773,   assuming all CYS residues are reduced
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.00

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.36, 26.00, 24.52]

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:92.4218
Grand average of hydropathicity (GRAVY):-0.13