Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2236
Number of amino acids:99
Molecular Weight:10906.87 Da
Theoretical pI:5.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1414.14%
Cysteine CYS (C)1111.11%
Glutamic Acid GLU (E)1212.12%
Aspartic Acid ASP (D)22.02%
Glycine GLY (G)33.03%
Phynylalanine PHE (F)44.04%
Isoleucine ILE (I)55.05%
Histidine HIS (H)11.01%
Lysine LYS (K)88.08%
Methionine MET (M)55.05%
Leucine LEU (L)77.07%
Asparagine ASN (N)22.02%
Glutamine GLN (Q)11.01%
Proline PRO (P)44.04%
Serine SER (S)22.02%
Arginine ARG (R)33.03%
Threonine THR (T)99.09%
Tryptophan TRP (W)11.01%
Valine VAL (V)44.04%
Tyrosine TYR (Y)11.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC469
HydrogenH758
NitrogenN122
OxygenO143
SulphurS16

FormulaC469H758N122O143S16
Total Number of Atoms:1508


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    7615
Absorption 0.1% (=1 g/l)    0.698,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.641,   assuming all CYS residues are reduced
Aromaticity:0.061

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 55.06

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.22, 11.11, 38.38]

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:73.1313
Grand average of hydropathicity (GRAVY):0.14