Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5531
Number of amino acids:445
Molecular Weight:50289.56 Da
Theoretical pI:5.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)286.29%
Cysteine CYS (C)20.45%
Glutamic Acid GLU (E)368.09%
Aspartic Acid ASP (D)235.17%
Glycine GLY (G)255.62%
Phynylalanine PHE (F)224.94%
Isoleucine ILE (I)204.49%
Histidine HIS (H)92.02%
Lysine LYS (K)194.27%
Methionine MET (M)51.12%
Leucine LEU (L)5813.03%
Asparagine ASN (N)316.97%
Glutamine GLN (Q)265.84%
Proline PRO (P)214.72%
Serine SER (S)388.54%
Arginine ARG (R)276.07%
Threonine THR (T)153.37%
Tryptophan TRP (W)10.22%
Valine VAL (V)245.39%
Tyrosine TYR (Y)153.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2232
HydrogenH3507
NitrogenN621
OxygenO689
SulphurS7

FormulaC2232H3507N621O689S7
Total Number of Atoms:7056


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):59
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27975
Absorption 0.1% (=1 g/l)    0.556,   assuming all pairs of CYS residues form cystines

Ext. coefficient    27850
Absorption 0.1% (=1 g/l)    0.554,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 53.65

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.46, 25.84, 28.54]

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:90.2921
Grand average of hydropathicity (GRAVY):-0.44