Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4006
Number of amino acids:502
Molecular Weight:56239.76 Da
Theoretical pI:8.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.57%
Cysteine CYS (C)81.59%
Glutamic Acid GLU (E)234.58%
Aspartic Acid ASP (D)265.18%
Glycine GLY (G)377.37%
Phynylalanine PHE (F)214.18%
Isoleucine ILE (I)193.78%
Histidine HIS (H)142.79%
Lysine LYS (K)265.18%
Methionine MET (M)81.59%
Leucine LEU (L)5210.36%
Asparagine ASN (N)224.38%
Glutamine GLN (Q)142.79%
Proline PRO (P)244.78%
Serine SER (S)489.56%
Arginine ARG (R)285.58%
Threonine THR (T)305.98%
Tryptophan TRP (W)81.59%
Valine VAL (V)336.57%
Tyrosine TYR (Y)285.58%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2526
HydrogenH3888
NitrogenN684
OxygenO743
SulphurS16

FormulaC2526H3888N684O743S16
Total Number of Atoms:7857


Total number of positively charged residues (ARG + LYS):54
Total number of negatively charged residues (ASP + GLU):49
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    86220
Absorption 0.1% (=1 g/l)    1.533,   assuming all pairs of CYS residues form cystines

Ext. coefficient    85720
Absorption 0.1% (=1 g/l)    1.524,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.41

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.07, 26.10, 23.11]

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:80.797
Grand average of hydropathicity (GRAVY):-0.30