Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4597
Number of amino acids:565
Molecular Weight:64518.13 Da
Theoretical pI:5.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)264.6%
Cysteine CYS (C)61.06%
Glutamic Acid GLU (E)539.38%
Aspartic Acid ASP (D)356.19%
Glycine GLY (G)417.26%
Phynylalanine PHE (F)284.96%
Isoleucine ILE (I)234.07%
Histidine HIS (H)81.42%
Lysine LYS (K)162.83%
Methionine MET (M)20.35%
Leucine LEU (L)407.08%
Asparagine ASN (N)284.96%
Glutamine GLN (Q)488.5%
Proline PRO (P)213.72%
Serine SER (S)539.38%
Arginine ARG (R)6311.15%
Threonine THR (T)203.54%
Tryptophan TRP (W)50.88%
Valine VAL (V)417.26%
Tyrosine TYR (Y)81.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2773
HydrogenH4393
NitrogenN867
OxygenO899
SulphurS8

FormulaC2773H4393N867O899S8
Total Number of Atoms:8940


Total number of positively charged residues (ARG + LYS):79
Total number of negatively charged residues (ASP + GLU):88
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39795
Absorption 0.1% (=1 g/l)    0.617,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    0.611,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 63.27

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.66, 25.31, 21.42]

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:69.1328
Grand average of hydropathicity (GRAVY):-0.88