Physicochemical Properties of Peptide



PPepDB ID:PPepDB_710
Number of amino acids:93
Molecular Weight:10454.8 Da
Theoretical pI:5.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)44.3%
Cysteine CYS (C)66.45%
Glutamic Acid GLU (E)1111.83%
Aspartic Acid ASP (D)33.23%
Glycine GLY (G)88.6%
Phynylalanine PHE (F)55.38%
Isoleucine ILE (I)33.23%
Histidine HIS (H)22.15%
Lysine LYS (K)66.45%
Methionine MET (M)33.23%
Leucine LEU (L)77.53%
Asparagine ASN (N)33.23%
Glutamine GLN (Q)11.08%
Proline PRO (P)33.23%
Serine SER (S)99.68%
Arginine ARG (R)55.38%
Threonine THR (T)77.53%
Tryptophan TRP (W)11.08%
Valine VAL (V)33.23%
Tyrosine TYR (Y)33.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC451
HydrogenH701
NitrogenN123
OxygenO145
SulphurS9

FormulaC451H701N123O145S9
Total Number of Atoms:1429


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10345
Absorption 0.1% (=1 g/l)    0.989,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.954,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.84

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.66, 24.73, 26.88]

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:55.5914
Grand average of hydropathicity (GRAVY):-0.49