Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3933
Number of amino acids:51
Molecular Weight:5719.51 Da
Theoretical pI:8.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)23.92%
Cysteine CYS (C)815.69%
Glutamic Acid GLU (E)23.92%
Aspartic Acid ASP (D)00%
Glycine GLY (G)59.8%
Phynylalanine PHE (F)23.92%
Isoleucine ILE (I)35.88%
Histidine HIS (H)23.92%
Lysine LYS (K)35.88%
Methionine MET (M)00%
Leucine LEU (L)23.92%
Asparagine ASN (N)611.76%
Glutamine GLN (Q)23.92%
Proline PRO (P)23.92%
Serine SER (S)47.84%
Arginine ARG (R)23.92%
Threonine THR (T)11.96%
Tryptophan TRP (W)11.96%
Valine VAL (V)11.96%
Tyrosine TYR (Y)35.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC243
HydrogenH367
NitrogenN73
OxygenO72
SulphurS8

FormulaC243H367N73O72S8
Total Number of Atoms:763


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10470
Absorption 0.1% (=1 g/l)    1.831,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    1.743,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.26

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.53, 33.33, 11.76]

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:47.8431
Grand average of hydropathicity (GRAVY):-0.42