Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5879
Number of amino acids:265
Molecular Weight:28590.26 Da
Theoretical pI:5.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)217.92%
Cysteine CYS (C)72.64%
Glutamic Acid GLU (E)197.17%
Aspartic Acid ASP (D)197.17%
Glycine GLY (G)3212.08%
Phynylalanine PHE (F)103.77%
Isoleucine ILE (I)103.77%
Histidine HIS (H)51.89%
Lysine LYS (K)2710.19%
Methionine MET (M)31.13%
Leucine LEU (L)155.66%
Asparagine ASN (N)62.26%
Glutamine GLN (Q)10.38%
Proline PRO (P)186.79%
Serine SER (S)155.66%
Arginine ARG (R)72.64%
Threonine THR (T)186.79%
Tryptophan TRP (W)62.26%
Valine VAL (V)176.42%
Tyrosine TYR (Y)93.4%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1276
HydrogenH1966
NitrogenN336
OxygenO391
SulphurS10

FormulaC1276H1966N336O391S10
Total Number of Atoms:3979


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    46785
Absorption 0.1% (=1 g/l)    1.636,   assuming all pairs of CYS residues form cystines

Ext. coefficient    46410
Absorption 0.1% (=1 g/l)    1.623,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.21

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.28, 26.79, 21.89]

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:63.3207
Grand average of hydropathicity (GRAVY):-0.49