Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4317
Number of amino acids:516
Molecular Weight:57956.12 Da
Theoretical pI:5.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)203.88%
Cysteine CYS (C)81.55%
Glutamic Acid GLU (E)428.14%
Aspartic Acid ASP (D)244.65%
Glycine GLY (G)417.95%
Phynylalanine PHE (F)183.49%
Isoleucine ILE (I)173.29%
Histidine HIS (H)152.91%
Lysine LYS (K)193.68%
Methionine MET (M)50.97%
Leucine LEU (L)417.95%
Asparagine ASN (N)336.4%
Glutamine GLN (Q)458.72%
Proline PRO (P)387.36%
Serine SER (S)438.33%
Arginine ARG (R)336.4%
Threonine THR (T)214.07%
Tryptophan TRP (W)40.78%
Valine VAL (V)346.59%
Tyrosine TYR (Y)152.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2518
HydrogenH3920
NitrogenN746
OxygenO806
SulphurS13

FormulaC2518H3920N746O806S13
Total Number of Atoms:8003


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):66
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    44850
Absorption 0.1% (=1 g/l)    0.774,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44350
Absorption 0.1% (=1 g/l)    0.765,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 58.03

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 30.04, 20.93]

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:66.8217
Grand average of hydropathicity (GRAVY):-0.84