Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4068
Number of amino acids:570
Molecular Weight:63559.09 Da
Theoretical pI:9.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)325.61%
Cysteine CYS (C)40.7%
Glutamic Acid GLU (E)234.04%
Aspartic Acid ASP (D)274.74%
Glycine GLY (G)468.07%
Phynylalanine PHE (F)386.67%
Isoleucine ILE (I)244.21%
Histidine HIS (H)81.4%
Lysine LYS (K)447.72%
Methionine MET (M)132.28%
Leucine LEU (L)447.72%
Asparagine ASN (N)305.26%
Glutamine GLN (Q)122.11%
Proline PRO (P)274.74%
Serine SER (S)529.12%
Arginine ARG (R)295.09%
Threonine THR (T)284.91%
Tryptophan TRP (W)91.58%
Valine VAL (V)5910.35%
Tyrosine TYR (Y)213.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2890
HydrogenH4486
NitrogenN768
OxygenO814
SulphurS17

FormulaC2890H4486N768O814S17
Total Number of Atoms:8975


Total number of positively charged residues (ARG + LYS):73
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    81040
Absorption 0.1% (=1 g/l)    1.275,   assuming all pairs of CYS residues form cystines

Ext. coefficient    80790
Absorption 0.1% (=1 g/l)    1.271,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.88

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.21, 27.19, 19.65]

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:82.158
Grand average of hydropathicity (GRAVY):-0.15