Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4280
Number of amino acids:538
Molecular Weight:61163.71 Da
Theoretical pI:6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)264.83%
Cysteine CYS (C)61.12%
Glutamic Acid GLU (E)488.92%
Aspartic Acid ASP (D)315.76%
Glycine GLY (G)407.43%
Phynylalanine PHE (F)254.65%
Isoleucine ILE (I)254.65%
Histidine HIS (H)91.67%
Lysine LYS (K)152.79%
Methionine MET (M)20.37%
Leucine LEU (L)397.25%
Asparagine ASN (N)275.02%
Glutamine GLN (Q)458.36%
Proline PRO (P)213.9%
Serine SER (S)529.67%
Arginine ARG (R)5810.78%
Threonine THR (T)152.79%
Tryptophan TRP (W)50.93%
Valine VAL (V)417.62%
Tyrosine TYR (Y)81.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2637
HydrogenH4184
NitrogenN822
OxygenO844
SulphurS8

FormulaC2637H4184N822O844S8
Total Number of Atoms:8495


Total number of positively charged residues (ARG + LYS):73
Total number of negatively charged residues (ASP + GLU):79
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39795
Absorption 0.1% (=1 g/l)    0.651,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    0.644,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.35

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.58, 26.02, 21.38]

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:73.3271
Grand average of hydropathicity (GRAVY):-0.79