Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4303
Number of amino acids:730
Molecular Weight:81927.88 Da
Theoretical pI:8.48


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)304.11%
Cysteine CYS (C)253.42%
Glutamic Acid GLU (E)476.44%
Aspartic Acid ASP (D)375.07%
Glycine GLY (G)577.81%
Phynylalanine PHE (F)324.38%
Isoleucine ILE (I)496.71%
Histidine HIS (H)91.23%
Lysine LYS (K)456.16%
Methionine MET (M)192.6%
Leucine LEU (L)618.36%
Asparagine ASN (N)375.07%
Glutamine GLN (Q)141.92%
Proline PRO (P)263.56%
Serine SER (S)658.9%
Arginine ARG (R)486.58%
Threonine THR (T)435.89%
Tryptophan TRP (W)40.55%
Valine VAL (V)506.85%
Tyrosine TYR (Y)324.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3614
HydrogenH5730
NitrogenN992
OxygenO1090
SulphurS44

FormulaC3614H5730N992O1090S44
Total Number of Atoms:11470


Total number of positively charged residues (ARG + LYS):93
Total number of negatively charged residues (ASP + GLU):84
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    71180
Absorption 0.1% (=1 g/l)    0.869,   assuming all pairs of CYS residues form cystines

Ext. coefficient    69680
Absorption 0.1% (=1 g/l)    0.851,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.20

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.23, 25.34, 21.51]

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:82.7397
Grand average of hydropathicity (GRAVY):-0.25