Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4296
Number of amino acids:490
Molecular Weight:52642.29 Da
Theoretical pI:7.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)5912.04%
Cysteine CYS (C)224.49%
Glutamic Acid GLU (E)275.51%
Aspartic Acid ASP (D)275.51%
Glycine GLY (G)5411.02%
Phynylalanine PHE (F)163.27%
Isoleucine ILE (I)183.67%
Histidine HIS (H)91.84%
Lysine LYS (K)193.88%
Methionine MET (M)102.04%
Leucine LEU (L)234.69%
Asparagine ASN (N)255.1%
Glutamine GLN (Q)102.04%
Proline PRO (P)295.92%
Serine SER (S)275.51%
Arginine ARG (R)377.55%
Threonine THR (T)214.29%
Tryptophan TRP (W)81.63%
Valine VAL (V)346.94%
Tyrosine TYR (Y)153.06%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2277
HydrogenH3549
NitrogenN681
OxygenO697
SulphurS32

FormulaC2277H3549N681O697S32
Total Number of Atoms:7236


Total number of positively charged residues (ARG + LYS):56
Total number of negatively charged residues (ASP + GLU):54
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67725
Absorption 0.1% (=1 g/l)    1.287,   assuming all pairs of CYS residues form cystines

Ext. coefficient    66350
Absorption 0.1% (=1 g/l)    1.260,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.27, 27.55, 24.29]

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:64.7959
Grand average of hydropathicity (GRAVY):-0.36