Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5120
Number of amino acids:645
Molecular Weight:71619.8 Da
Theoretical pI:7.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)396.05%
Cysteine CYS (C)152.33%
Glutamic Acid GLU (E)314.81%
Aspartic Acid ASP (D)345.27%
Glycine GLY (G)426.51%
Phynylalanine PHE (F)324.96%
Isoleucine ILE (I)355.43%
Histidine HIS (H)71.09%
Lysine LYS (K)314.81%
Methionine MET (M)182.79%
Leucine LEU (L)639.77%
Asparagine ASN (N)314.81%
Glutamine GLN (Q)253.88%
Proline PRO (P)233.57%
Serine SER (S)6510.08%
Arginine ARG (R)345.27%
Threonine THR (T)446.82%
Tryptophan TRP (W)40.62%
Valine VAL (V)477.29%
Tyrosine TYR (Y)253.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3174
HydrogenH5010
NitrogenN852
OxygenO966
SulphurS33

FormulaC3174H5010N852O966S33
Total Number of Atoms:10035


Total number of positively charged residues (ARG + LYS):65
Total number of negatively charged residues (ASP + GLU):65
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    60125
Absorption 0.1% (=1 g/l)    0.840,   assuming all pairs of CYS residues form cystines

Ext. coefficient    59250
Absorption 0.1% (=1 g/l)    0.827,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.76

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.94, 24.96, 23.41]

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:86.4341
Grand average of hydropathicity (GRAVY):-0.10